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Meet the challenge: the Alba crankset by Praxis Works
Every weekend deep in the hills of Santa Cruz, cyclists are brought to their knees by a nasty, four mile, 1800 ft. climb named Alba road. This respected climb was the inspiration for the Praxis works Alba road crank. With its shapely forged alloy arms connected to the M30 BB and spindle system, the Alba is ready for anything you pedal up against.
Compatibility: 2x10-speed, 2x11-speed
Chainring Mount: 110 mm bolt circle diameter, 5-arm
Crankarm Material: aluminium
Chainring Material: aluminium (7075-T6)
Axle Material: aluminium
Gradation: 32-48, 34-50, 36-52
Crankarm Length: 170.0 mm, 172.5 mm, 175.0 mm
Chainline: 43.5 mm
Q-Factor: 147 mm
Axle Diameter: 30 mm right, 28 mm left
Compatible BSA Bottom Bracket Shell Width: 68 mm
Recommended Bottom Bracket: Praxis Works M30 (e.g. BSA, BB86, 386EVO, BB30/PF30)
Recommended Chain: Shimano, Campagnolo or KMC
- solid forged arms - 110BCD
- superior manufacturing process that forges 7075 T6 aluminium chainrings with more tooth detail than ever before
- chainrings hard anodized
- for 68 mm Road frames (BSA, BB86, BB30, PF30, Specialized Road OSBB)
- compatible with braze-on or ST clamp front derailleur
- works with Shimano 10/11, Campy 10/11, SRAM 10/11 (Di2 and EPS as well)
- 1X option - 40t & 42t Wave Tech rings or Direct Mount with Praxis Works Wave Tech Direct Mount rings
- M30 spindle/bottom bracket system
Please note the Praxis Works installation instructions.
Forging Process (Cranks)
With Praxis Works' deep history of complex metal manufacturing, it was natural for them to continue to work with aluminium as the crank line evolves. The Zayante and Girder cranks are made with a unique hollow forging process while the Alba and Cadet cranks are made with a solid forging method. Both of these forging processes align the grain of the metal through the use of massive pressure resulting in light weight, tough, and super durable crank arms.
Attention to detail and proprietary in-house forging allows Praxis Works to control the process from start to finish, and maximize performance from each aluminium part. Combine this with the famous Praxis Works chainrings, and the final product is a beautiful assembly that provides an incredible ride experience.
Cold Forging (Chainrings)
Forging is the process by which metal is shaped applying heavy compressive force. At Praxis, this compressive force comes in the form a very large forging press.
Similar to wood, metal has grain to it. Forging refines that grain structure and improves the physical properties of the 7075 T6 aluminium blanks Praxis Works starts with. With their ring designs, the grain flow can be oriented in the direction of principal stresses (the chain) encountered while riding.
Physical properties (such as hardness and toughness) are also much better in a forging than in the base metal which has grain crystals randomly oriented. The chainrings produced here yield very high strength to weight ratio.
Like all great marriages in life, timing is everything. A large part of Praxis Works LevaTime shifting system is the timing and clocking of the outer and inner rings together. All of the Praxis ring combinations are " Matched Sets" precisely designed in concert for an optimized shifting experience. Praxis engineers spend an obscene amount of time labouring over tooth shape, ramping, and the precise location of shift elevators. All of this is done in order for the inner and outer ring to be in perfect sync at the moment you shift.
The M30 bottom bracket family is for the M30 cranks. The M30 spindles are 30 mm and then have a step-down to 28 mm to lock on the Non Drive bearing. These use a drive side wave-washer for the bearing preload, and a 30 mm Drive bearing with a step down to 28 mm Non Drive bearing. With the superior support of this wide stance, the M30 system takes power transfer to a new level. It elegantly combines the benefits of a stout 30 mm alloy spindle, with the support benefits of an wide-stance bearing to get the best of both worlds.
Manufacturer Part Numbers:
170.0 mm 32-48 teeth: DM-A170-4832
172.5 mm 32-48 teeth: DM-A1725-4832
175.0 mm 32-48 teeth: DM-A175-4832
170.0 mm 34-50 teeth: DM-A170-5034
172.5 mm 34-50 teeth: DM-A1725-5034
175.0 mm 34-50 teeth: DM-A175-5034
170.0 mm 36-52 teeth: DM-A170-5236
172.5 mm 36-52 teeth: DM-A1725-5236
175.0 mm 36-52 teeth: DM-A175-5236
- 1 x Praxis Works Alba crankset (32-48t, 34-50t or 36-52t)
- bottom bracket not included
- M30 tool not included