FREQUENTLY ASKED QUESTIONS

|FAQ
FAQ2018-01-18T08:10:03+00:00

ROAD CHAINRING QUESTIONS

To create the most precise shifting possible, the big ring and smaller rings need to be designed as one. The timing of the rings (or ‘clocking’) is extremely important. It allows the big and small rings to always be in sync and properly aligned for the chain to move smoothly at the time you shift. This is the basis of our LevaTime® shifting technology. If the timing is off by incorrect mounting or you substitute a different ring than the matched combo, the shift quality will degrade and problems will occur. Do NOT substitute any other ring type or tooth count into your Praxis matched pair.
The two silver pieces are two different lengths of catch pins. Catch pins are designed to prevent the chain from becoming wedged between the crank and the ring in the event of a derailment. You’ll choose the catch pin that comes closest to your crank arm without touching. The tiny black piece is a threaded plug designed to cover the hole in the big ring that you are not threading a catch pin into. You’ll need a 2mm allen wrench to install the pins and plug.
BCD is an acronym for Bolt Circle Diameter. This is the diameter of the circle that goes through the center of all of the bolts on your chainring. 110BCD generally is referred to as compact and mid-compact (Praxis 46-36, 48-32, 50-34, 52-36 rings as well as 38t, 40t and 42t 1x rings) while 130BCD is known most commonly as “standard” (Praxis 53-39, 54-42 and 56-42 rings). Praxis also makes 104BCD and 94BCD Wave rings, as these are two of the most common MTB BCD’s.
Praxis 48-32 chainrings are compatible with our Praxis Alba, Praxis Zayante and Zayante Carbon cranks as well as the new Specialized alloy 110BCD spider. These chainrings are not compatible with any other cranks or spiders. Note: 48-32 rings are not compatible with TURN Zayante cranks
YES, our rings work great on both 10sp AND 11sp drivetrains. That goes for Shimano 10/11 speed drivetrains and Campy 10/11sp drivetrains. Both Di2/Eps and Mechanical work great. Also, our rings shift great with SRAM 10sp drivetrains and the new SRAM 22 11sp drivetrains. Yaw Front derailleurs work great with our rings too.
YES – Our rings work great on power meters from companies like Power2Max, SRM, InfoCrank, Rotor, and newer Quarq systems. Some older Quarq systems were finicky in calibration and per Quarq our 52/36 set and 53/39 Clover calibrated best on those. But the newer Quarq Elsa and Riken are no problem at all. Mount them up!
For Road, any traditional 5 arm crank or 4-arm (with hidden 5th bolt) that is 110BCD or 130BCD. There are a few cranks out there that have custom mounting or BCD that our rings do not mount on. For example: Newer Shimano 9100 series 4 arm cranks, the Zipp Vuma Quad and Campy Cranks. Our rings are NOT made for these 4-arm cranks as they use a custom BCD.
If using Praxis chainring bolts, then you should torque them to 10nm.
X-Rings are proprietary to Praxis’ X-Spider, which is the spider used on the Zayante Carbon cranks. These rings use a 160BCD/104BCD 4-bolt attachment and employ female threads in the big ring. The X-Rings are compatible only with the Zayante Carbon. X-Rings are not compatible with other 110BCD 5-bolt Praxis cranks or spiders. The X-Rings and spider on the Zayante Carbon make it possible to use a 48-32 sub-compact ring set all the way up to a 53-39 set on the same spider. The X-Spider can be removed and a Praxis 1x direct-mount Wave ring can be installed if needed.

WAVE TECH CHAINRING QUESTIONS

Yes, you can use any direct mount chainring that uses the 3-bolt interface standard. It is very important to understand that Praxis only guarantees a 49mm (non-Boost) or 52mm (Boost) chainline on our M30 and M30 Thru MTB cranks if using the appropriate Praxis Direct-Mount Wave chainring.
Wave rings are available for 94 BCD and 104 BCD 4-bolt spiders (MTB), 110 BCD spiders (Cross/Gravel) and Direct-Mount 3-bolt interface (Cross/Gravel/MTB). You will want to verify what BCD your spider uses or what direct-mount interface your crank employs prior to making a purchase.
BCD is an acronym for Bolt Circle Diameter. This is the diameter of the circle that goes through the center of all of the bolts on your chainring. Praxis makes 104BCD and 94BCD Wave rings for MTB, as these are two of the most common MTB BCD’s.

CHAIN QUESTIONS

Due to the amount of mixing and matching riders do with drivetrain components, shift performance is very subjective. That being said, for the best shifting experience we highly suggest using KMC, Shimano, or Campy chains.
We highly suggest using KMC, Shimano, or Campy chains. Certain other brands did not perform well in our testing and we cannot suggest those chains due to poor shift quality and higher occurrence of fouled shifts with those brands. Please use one of the 3 brands we suggest for the designed shifting experience with Praxis Works LevaTime chain rings.

We also suggest always using a new chain when replacing chainrings to ensure the best shifting experience.

CONVERSION BB QUESTIONS

For Praxis Conversion BB’s with external cups (not M30 or M30 Thru), you’ll need two (BSA requires only one) standard 16-notch BB cup tools, such as Park Tools’ BBT-9 or BBT-19. You’ll also need a press tool for all Praxis BB installations (except for BSA threaded and T47), such as Park Tools’ HHP-3 or HHP-2. For removal of Praxis BB’s, a cup removal tool such as Park Tools’ RT-2, RT-1 is required to remove the non-drive cup (or both cups/bearings for some models). Praxis BSA threaded BB’s and T47 BB’s do not require a cup removal tool to remove them.
Praxis recommends that your BB is removed and reinstalled according to our instructions at least once per season as a standard service interval. If you own a Praxis Conversion BB, you can try to simply tighten the drive cup while holding the non-drive cup. There is no torque specification on the drive cup, you must tighten it until you feel a hard stop or you cannot turn the cup further.
Specialized ceased manufacturing of their OSBB BB shells in mid 2014. OSBB BB shells are 61.5mm wide whereas non-OSBB BB shells are 68mm wide. Even if you do not know what you have, you can order the OSBB version and you will have what you need. According to what BB shell you have, you’ll either need to install the included OSBB sleeves/cups or you will not need them. The two BB’s (OSBB version and non-OSBB version) are identical aside from the type of delrin sleeves or cups included.
Praxis makes a complete line of BB’s for most BB shells to install our own M30 and M30 Thru cranks. We also have BB’s for Shimano Hollowtech 2 cranks, Praxis M24, SRAM or Oval cranks using a GXP spindle and Campagnolo Ultra-Torque cranks. M30 Thru BB’s are also compatible with Race Face “Cinch” and Rotor MTB cranks using a 30mm spindle. Praxis Conversion BB’s for Shimano, SRAM GXP, Campagnolo UT, Race Face Cinch and Rotor MTB cranks w/30mm spindles are compatible with BB30 and PF30 BB shells only.
Ceramic bearings will buy you less friction and will be a few grams lighter. They are not necessarily more durable than steel bearings however. The ceramic bearings do carry a 1yr warranty against defects in workmanship or materials.
Shimano Conv BB – Current versions use an Enduro 2437 bearing with our current orange outer seal.

SRAM GXP/M24/ISIS2 Conv BB- uses an Enduro 2437 bearing for drive side and 2237ER w/Extended race on the NonDrive side.

M30 BB’s all use (except for M30 BB86, BB90/92) a 6806 on the drive side and a custom 6806 with a reducer on the non-drive side. The non-drive bearing on M30 BB’s is specific to Praxis and is not available separately anywhere.

This is really a two part answer. If the BB is modified or changed from its original state, then the warranty is void. This includes pulling/changing your bearings. Having said that, yes, technically it can be done using professional grade puller/press. So when your bearings reach their end of life or you feel it’s time, you simply have to make a choice.

Choice 1: If you want warranty/support, you will simply purchase a new BB.
Choice 2: If you don’t care about warranty, then you can just pull/repress new bearings. We just have to be clear that when you do this modification, the Praxis warranty has been voided.

M30 BB QUESTIONS

For our M30 BB’s that use external cups, you need the Praxis M30 tools. You’ll also need a press tool for all Praxis BB installations (except for BSA threaded and T47), such as Park Tools’ HHP-3 or HHP-2. For removal of Praxis BB’s, a cup removal tool such as Park Tools’ RT-2, RT-1 is required to remove the non-drive cup (or both cups/bearings for some models). Praxis BSA threaded BB’s and T47 BB’s do not require a cup removal tool to remove them.
No, Praxis M30 BB’s are compatible with Praxis M30, Oval M30, InfoCrank M30 (M30 386 BB is not compatible with InfoCrank M30) and Box Vector M30 cranks only.
Praxis recommends that your BB is removed and reinstalled according to our instructions at least once per season as a standard service interval. If you own a Praxis Conversion M30 BB, you can try to simply tighten the drive cup while holding the non-drive cup. There is no torque specification on the drive cup, you must tighten it until you feel a hard stop or you cannot turn the cup further.
M30 BB’s all use (except for M30 BB86, BB90/92) a 6806 on the drive side and a custom 6806 with a reducer on the non-drive side. The non-drive bearing on M30 BB’s is specific to Praxis and is not available separately anywhere.

This is really a two part answer. If the BB is modified or changed from its original state, then the warranty is void. This includes pulling/changing your bearings. Having said that, yes, technically it can be done using professional grade puller/press. So when your bearings reach their end of life or you feel it’s time, you simply have to make a choice.

Choice 1: If you want warranty/support, you will simply purchase a new BB.
Choice 2: If you don’t care about warranty, then you can just pull/repress new bearings. We just have to be clear that when you do this modification, the Praxis warranty has been voided.

M30 THRU BB QUESTIONS

For our M30 Thru BB’s that use external cups, you need the Praxis M30 tools. You’ll also need a press tool for all Praxis M30 Thru BB installations (except for BSA threaded and T47), such as Park Tools’ HHP-3 or HHP-2. For removal of Praxis M30 Thru BB’s, a cup removal tool such as Park Tools’ RT-2, RT-1 is required to remove the non-drive cup (or both cups/bearings for some models). Praxis M30 Thru BSA threaded BB’s and T47 BB’s do not require a cup removal tool to remove them.
Praxis makes a complete line of M30 Thru BB’s for most BB shells to install our own M30 Thru cranks. M30 Thru BB’s are also compatible with Race Face “Cinch” and Rotor MTB cranks using a 30mm spindle.
Praxis recommends that your BB is removed and reinstalled according to our instructions at least once per season as a standard service interval. If you own a Praxis Conversion M30 Thru BB, you can try to simply tighten the drive cup while holding the non-drive cup. There is no torque specification on the drive cup, you must tighten it until you feel a hard stop or you cannot turn the cup further.
M30 Thru BB’s all use (except for M30 Thru BB86, BB90/92) a 6806 bearing on both the drive side and non-drive side.
This is really a two part answer. If the BB is modified or changed from its original state, then the warranty is void. This includes pulling/changing your bearings. Having said that, yes, technically it can be done using professional grade puller/press. So when your bearings reach their end of life or you feel it’s time, you simply have to make a choice.
Choice 1: If you want warranty/support, you will simply purchase a new BB.
Choice 2: If you don’t care about warranty, then you can just pull/repress new bearings. We just have to be clear that when you do this modification, the Praxis warranty has been voided.

MTN CRANK QUESTIONS

Yes, you can use any direct mount chainring that uses the 3-bolt interface standard. It is very important to understand that Praxis only guarantees a 49mm (non-Boost) or 52mm (Boost) chainline on our M30 and M30 Thru MTB cranks if using the appropriate Praxis Direct-Mount Wave chainring.
Generally, DMA rings are for non-Boost frames and DMB rings are for Boost frames. DMA rings will produce a 49mm chainline on non-Boost frames and DMB rings will produce a 52mm chainline on Boost frames. If you are unsure if your frame is Boost or not, please check with your bike shop or the manufacturer.

ROAD CRANK QUESTIONS

No, Praxis M30 cranks are compatible only with M30 BB’s.

Praxis M30 road cranks are compatible with BB30/PF30, BSA threaded, BB86, 386 EVO, BBright and T47 BB shells when using the corresponding M30 BB. Many newer Cannondale frames employ their proprietary BB30A or PF30A BB shells. These BB shells are 73mm wide and Praxis BB’s and cranks are not compatible.

No, Praxis M30 road cranks are compatible with BB30/PF30, BSA threaded, BB86, 386 EVO, BBright and T47 BB shells when using the corresponding M30 BB. BB90 road BB shells are found on Trek frames only and Praxis BB’s and cranks are not compatible.
We offer a 4iiii Precision left arm power meter sold with a complete Zayante crankset with chainrings. Otherwise, you can install a spider based PM that uses the 3-bolt attachment interface, such as QUARQ or Power 2Max on any direct-mount Praxis crank.
Please contact 4iiii support@4iiii.com for support on the Precision power meter that is part of the Zayante + 4iiii crankset. Here is a link to the 4iiii FAQ: http://4iiii.com/support/frequently-asked-questions/precision/

CASSETTE QUESTIONS

We know many people will be experimenting with all sorts of road/CX setups with this cassette, but Praxis Support & Warranty is limited to 10sp MTB drivetrain use and with 10sp MTB Mid or Long cage rear derailleurs as per the specification/design of the product.

The cassette is a ‘Wear and Tear’ product and life expectancy will definitely vary between rider types/weights and of course the environment and conditions you ride in. That being said, keep your drivetrain clean and never ride a worn out chain. A stretched/worn out chain can and will cause premature wear of other parts on your drivetrain.
By screwing down your B-Tension screw, you will simply adjust so that your upper rear derailleur pulley clears the largest cog by at least a few millimeters.

WHEEL QUESTIONS

Yes, good guess! The numbers represent the inside width of the rim from wall to wall. The inside width is important because it determines the profile that mounted tires round out to. Our widths are designed to create optimum tire profiles in all size rubber.
At this time, we build exclusively with J-bend hubs and spokes so that our wheels can be serviced and repaired in the field with readily available spokes. In the future we might offer other hub and spoke spec.

Yes. All Praxis Wheels come with Praxis tubeless rim strips already installed.

Yes. All Praxis Wheels come with Praxis tubeless valves already installed.

Glad you asked. All Praxis rims are designed so that anyone can mount their tubeless tires. The trick to mounting tubeless tires is being sure to first get the “beads” (the edges of the tires) down into the bottom, center of the rim (called the “rim well”) – before trying to pop the tire fully onto the rim.

If a tire is resisting going on or coming off, something is wrong with the way the tire is positioned on the wheel. The most common issue is that parts of the beads are stuck too high, up on the rim bead shelves. When that happens, it makes the tire too tight to get it up and over and onto the rim.

So, take your time and go around the wheel checking both sides of the tire, pushing the tire in and making sure that the beads are down in the center deepest part of the rim. In this position, you create slack in the tire that makes it possible to lift it up and onto the rim.

It’s impossible to cover every possible reason that tires go flat or lose air like this here. But, you should start by making sure there are no cuts or gashes anywhere in the tire. You can usually hear and then see these types of punctures if you turn the wheel and inspect all around the tire as someone else is pumping air into it.

No cut? Check to see if the tubeless tire has moved out of position and is no longer sealed against the rim all around. For example, if the tire goes completely flat, it might have gotten pinched together in such a way that the air is leaking out beneath it. You want to find that spot and try to manipulate the tire (try pushing down as the air is rushing in) and get it to seat up against the rim again.

Another possibility is that sealant inside the tubeless tire has dried up. Sealants do that over time. If that’s the case, you only need to remove one side of the tire, pour some new sealant in, remount the tire and the sealant will work its magic to seal all the leaks when you inflate the tire.

It’s unlikely you could bend a wheel installing the tires. Much more likely is that the wobbly tire is not fully “seated” on the rim. A wobbly tire will make the whole wheel look wobbly. All tires are designed to sit in only one position on rims. When a tire is properly in place, we say it’s “seated.”

To check seating, look at one side of the tire and rim and then the other side. The tire has a bead seat line on both sides – little ridges molded into the tire all around it. The seat lines should be visible and the same distance from the top of the rim all around the tire. If the bead seat line dips down below the rim and you can’t see it, you know the tire isn’t fully seated.

Usually, you can seat stubborn tire sections like this by adding pressure little by little until the tire makes a loud “pop” and it seats itself. You can also let some air out and spray a soap solution so its gets down between the tire and rim, and the soap will help the tire move up and seat.

Yes, it’s fine to run tire inserts like those you mentioned. They can make tire installation more difficult but they let you run lower pressures and prevent tire squirm.
Praxis wheels are designed to accept standard J-bend spokes available at most bicycle shops. If you bring the wheel with the broken spoke into the shop, a mechanic can easily find you the right length replacement spoke. Alternatively, please contact us at the link above, tell us which model wheels you have and we can give you the right length or sell you replacement spokes.

In most cases, yes. We use DT Swiss hubs, which can be changed out with a variety of axle caps and ends to your choice of axle configuration. Please note that for some changes, it might be necessary to re-dish the wheel . “Dishing” is tensioning the spokes in such a way to ensure the rim is exactly centered in the frame (wheel building or truing experience needed).

Yes. You’ll need to purchase the correct Shimano freehub type for the DT Swiss hub model you have on your Praxis wheel. Then, simply pull off the XD driver and install the Shimano. It might be necessary to re-dish the wheel. “Dishing” is tensioning the spokes in such a way to ensure the rim is exactly centered in the frame (wheel building or truing experience needed).
Praxis wheels are designed to be easy to fix. What you describe sounds like a spoke has loosened. If you have a spoke wrench, which is available at any bike shop, you can probably true your own wheel by tightening the loose spoke.

To find the loose spoke spin the wheel and watch for the wobble. When the wobble comes into sight, stop the wheel holding the wobbly area. If the rim wobbles to the right, a spoke on the left has loosened (and vice versa). To find the loose spoke pluck each spoke on the left of the wheel in the wobble area with your fingers – like plucking a guitar string. The loose spoke will sound “dead” compared to the others.

To retighten and true your wheel, simple turn the nipple affixed to the loose spoke clockwise (when viewed from 12 o’clock) until when plucked, that loose spoke makes the same pitch sound as the other spokes. Once that loose spoke is as tight as its neighbors, the wheel will be true again.

If you don’t want to tackle wheel truing, any bicycle shop can do it and it’s usually reasonably priced. Some mechanics/shops might let you watch so you can learn, too.

PRODUCT RETURN QUESTIONS

Praxis has a 30-day no questions asked return policy for products purchased from our website. You will need to call or email us to obtain a Return Authorization #. When the returned item is received at Praxis, we will refund your credit card or PayPal the cost of the product plus any applicable tax.

To obtain a RA# please call us at (831) 423-7464 or email us at sales@praxis-works.com

Ship product back to:
Praxis Works
207 McPherson St #E
Santa Cruz, CA 95060