Cranksets
Complete cranksets, crank arms and chainrings supplied together, for road, gravel and MTB. Choose them on the spindle your bottom bracket accepts, the number of chainrings and the crank length.
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GARBARUK XC DUB aluminium MTB crankset -
GARBARUK ROAD/GRAVEL DUB aluminium road and gravel crankset -
MAAKE ISIS 20 crank removal tool -
CYBREI 2X CHAINRING BOLT KIT aluminium chainring bolts -
CYBREI GP-3 EVO carbon road crankset -
CYBREI GP-3 METARBON carbon road crankset -
CYBREI ULTRA EVO carbon road crankset -
CYBREI ULTRA METARBON carbon road crankset -
STONE AERO DUB 8-BOLT aluminium road and gravel crankset
The spindle follows the bottom bracket
Before brand or material, measure the inner diameter of your bottom bracket bearings with a calliper: 29 mm means SRAM DUB; 24 mm, Shimano. A spindle's name refers to the bottom bracket, not the groupset. The Cybrei GP-3 Evo comes in both, with the same 92 mm spindle width: chainline and Q-factor stay the same. The Garbaruk and Stone cranksets are DUB, and their product pages give the bottom bracket width they accept.
Double or single chainring
The Cybrei cranksets are road doubles in 50/34, 52/36 or 54/38, always 16 teeth apart, so the jump stays the same for the front derailleur. With 700 × 28 tyres, the 54-tooth chainring on the 11 cog gives 57 km/h at 90 rpm, against 52 km/h with a 50. The Stone Aero DUB 8-bolt is a single chainring crankset from 40 to 56 teeth for a SRAM AXS Flattop chain, and the Garbaruk Road/Gravel a single from 36 to 46 teeth, with cranks and chainring in the same colour.
Carbon or aluminium
The Ultra Metarbon takes carbon all the way to the spindle: 445 g calculated in 50/34. What that changes can be calculated: for a rider and bike at 75 kg, 100 g less saves about 5 seconds per hour of steep climbing, at the same power. Garbaruk saves weight another way, with crank arms made from two machined 7075 aluminium shells joined together hollow.
Crank length
The GP-3 comes in eleven lengths, from 150 to 175 mm in 2.5 mm steps. Going from 172.5 to 165 mm raises the foot by 7.5 mm at the bottom of the stroke: you raise the saddle by the same amount, and at the top of the stroke the gap between saddle and pedal grows by 15 mm. The hip opens. To remove a Cybrei crank, have the ISIS 20 crank removal tool to hand; crank arms on their own leave you free to choose chainrings and power meter.
Frequently asked questions
Which crank length should I choose?
It is set by leg length and hip mobility more than by frame size. A shorter crank opens the hip at the top of the pedal stroke; you make up for the lost leverage by spinning a little faster.
Is my bottom bracket SRAM DUB or Shimano 24 mm?
Measure the inner diameter of the bearings with a calliper: 29 mm for DUB, 24 mm for Shimano. The shell format, threaded BSA or T47 or press-fit, is a separate question, settled by the bottom bracket itself.
50/34, 52/36 or 54/38?
50/34 for the mountains and mixed routes, 52/36 to ride fast while keeping enough to climb, 54/38 for flat terrain and high speeds. All three keep a 16-tooth gap between the chainrings.