Granite ChainDock Dummy Hub
Granite ChainDock Dummy Hub
Wheel out. Frame safe. Chain docked.
A dummy hub for thru-axle and QR frames. It braces the rear triangle when the bike is boxed, and keeps the chain on a docking wheel so you can turn the crank to clean it. Adjusts 130–157 mm.
Description
The Granite ChainDock is a dummy hub, also called a chain keeper: it goes into the rear dropouts when the wheel comes out. It braces the rear triangle so the frame isn't crushed in a bike box or car trunk, and holds the chain on a docking wheel so it stays off the paint and you can still turn the crank to clean and lube it.
It adjusts from 130 to 157 mm to match your dropout spacing, so one ChainDock covers road, gravel and Boost or Super Boost mountain bikes. Set the length with the lock nut, loop the chain over the wheel, then run your own 12 mm thru-axle or quick-release skewer through it and tighten as normal. The axle clamps it in place, so it doesn't rely on friction to stay put. Two QR adapters are included.
The body is machined 6061 alloy, 73 g in the thru-axle setup; the QR adapters add 10 g. Black with orange anodized lock nut and adapters. Not for single-speed or belt-drive bikes. More on when a dummy hub earns its place: Why every cyclist needs a dummy hub.
Feature
Travel without a crushed frame
Braces the rear triangle so a bike box, car trunk or baggage handler can't squeeze the dropouts together. The chain stays tensioned instead of flopping against the paint.
Clean the chain, wheel out
Loop the chain over the docking wheel and turn the crank. Lube and wipe every link with no spinning wheel next to your fingers.
One unit, 130 to 157 mm
Thread it out to your dropout spacing and lock the nut. Road, gravel, Boost and Super Boost; 12 mm thru-axle, or QR with the included adapters.
Fit it in three steps
Set the length
Thread the body out until it just touches the inside of both dropouts, then hand-tighten the orange lock nut. On a QR frame, push the two adapters onto the ends first.
Seat it, dock the chain
Sit the ChainDock between the dropouts with the docking wheel on the drive side, and loop the chain over it.
Run your axle through
Slide your thru-axle or QR skewer through the dropouts and the ChainDock, and tighten as you would with the wheel in. Now pack the bike or spin the crank.
Specs
- Adjustable length130–157 mm dropout spacing
- Axle12 mm thru-axle; quick-release with the two included adapters
- MaterialMachined 6061 alloy body, lock nut and QR adapters
- Docking wheelPlastic; floats on the axle to follow the chain line
- Weight73 g (thru-axle setup); QR adapters add 10 g
- DrivetrainMulti-speed chain drivetrains; not for single-speed or belt drive
- ColorBlack with orange anodized lock nut and adapters
- In the boxChainDock body, lock nut, docking wheel, 2 QR adapters