Description
The MTB cousin of the Zayante road, the Praxis Girder M30 Hollow Forged Crank aims to become a go-to MTB Trail crank for all types of riding. The Girder M30 combines the benefits of a wide outboard bearing stance with a 30mm aluminium spindle. Add in our stout hollow forged crank arms and you have a tremendous amount of stiffness as you carve and climb.
Praxis Works Cold Forged chainrings and M30 Bottom Brackets round out the Praxis Girder M30 package for what is a very versatile MTB Trail Crank with top notch shifting. The Girder M30 Crank can be installed in 68/73mm BSA English Threaded, BB92, or 73mm BB30/PF30 MTB frames.
Features
COMPATIBILITY NOTES
Bottom Bracket
The Girder M30 requires the use of a Praxis M30 Bottom Bracket as it has a 30mm drive bearing, and a 28mm non-drive bearing unique to Praxis. Please choose from the M30 options above for your specific frame spec.
DM Ring
We make two versions of our DM rings for correct chainlines “DM-A” or “DM-B”.
When installed on a Praxis mtn crank: DM-A = 49mm NON-BOOST Chainline.
When installed on a Praxis mtn crank: DM-B = 52mm BOOST Chainline.
Praxis MTB rings work great with both Shimano and SRAM 10sp and 11sp chain and drivetrains.
THESE CRANKS DO NOT COME WITH THE REQUIRED INSTALLATION TOOLS, PLEASE ORDER SEPARATELY.
Note: Chainline is critical. Do NOT install another brand DM ring on a Praxis Mtn crank as the chainline will not be correct 49mm or 52mm Boost.
Specification
• Aluminium Hollow Forged arms.
• Optional Forged Aluminium 104 BCD Spider.
• 165/170/175mm | 3-bolt direct mount ring interface.
• M30 Spindle | Requires Praxis M30 BB.
• Wave Tech DM ring 49mm or Boost 52mm chain line.
• Works with 10/11/12sp chains.
• Weight: 684g (175mm with 32t).
• Q-Factor: 172mm.
Warranty
Press/Review
Praxis…had got a superb global reputation for their ultra long lived, cold forged and machined chain-rings and pioneering ‘self installing’ threaded sleeve press-ft bottom bracket solutions.
From experience they’re equally epic in their glassy smooth spinning lifespan
You’ll need an M30 tool (£24.99) to ft the BB but once fitted, crank installation (and extraction) is blissfully simple thanks to the captured 10mm hex bolt, so you won’t be stranded without specialist tools.
Chain retention has been excellent even going mental on a rowdy short travel bike without a supplementary chain-guide. Negligible wear so far suggests that Praxis’s longevity reputation is also richly deserved.
Article Here
MBUK
DURABILITY KINGS PRAXIS have joined up their BB and chainring offerings with these bomber cranks.
The huge box-section arms … massive stiffness is obvious as soon as you put foot to pedal.
… an oversize 30mm axle and they haven’t flinched or flexed under even our most hardcore testers.
… the ultra tough, impressively secure cold-forged Praxis chainring won’t need replacing any time soon.
Praxis’s BBs (£34.99- 59.99) are equally durable, and available to fit all frames.
Review Click Here
Singletrack
As a system, the Girder M30 crankset is hella stiff. The hollow forged crank arms are certainly tough, though the wide-stance bottom bracket and oversized bearings also contribute to the Girder’s stable feel underfoot. Speaking of which, the Girder M30 cranks do sit wide with a 185mm Q-factor. This gives great stability on a trail bike...
The cranks are impressively stiff, and those who are hard on their gear will love them. With shorter 165 and 170mm crank lengths available, they’d be ideal for long-travel trail bikes with belly-scraping BBs.
Overall: … given their sturdiness, the no-fuss BB, and the fact that I never dropped a chain, I’d have no troubles recommending them for BB30 users.
Really, you’d be fussy asking for more.
Review Click Here