Eccentric Bottom Bracket
$150.00
Angular contact bearings are pressed directly into the eccentric bodies. Each half of the eccentric has an expanding wedge to take up radial clearance. Two M6 bolts securely sandwich the eccentric halves to the frame. Removing or tensioning the timing chain requires a single 5mm allen key. Weighs only 170g including bearings.
Fits shells 53.8 to 55.0mm diameter; select “68” for shells 64 to 68mm wide or “73” for shells 69 to 73mm wide.
Angular contact bearings are pressed directly into the eccentric bodies. Each half of the eccentric has an expanding wedge to take up radial clearance. Two M6 bolts securely sandwich the eccentric halves to the frame. Removing or tensioning the timing chain requires a single 5mm allen key. Weighs only 170g including bearings.
Fits shells 53.8 to 55.0mm diameter; select "68" for shells 64 to 68mm wide or "73" for shells 69 to 73mm wide.
Turn the eccentric with your coupler wrench or 5mm hex key to tension the timing chain/belt. We recommend positioning the crank spindle "up". The 4mm screws should be finger tight (<1N-m) with a 3mm hex wrench. The 4mm screws expand a wedge to fit the bore of the bottom bracket shell snugly. The eccentric should spin with some resistance, but not get stuck. The 4mm shouldn't need adjusting after initial installation. Tighten the 6mm bolts to 10-12Nm with a 5mm wrench.
Replacement bearings for the 30mm eccentric are 42mm OD, 30mm ID, 7mm wide angular contact bearings (commonly 6806 or 71806). Replacement bearings for the DUB eccentric are Enduro 6806/29. When replacing bearings, we recommend securing the outer race with Loctite 609.
Additional information
| Weight | .50 lbs |
|---|---|
| Dimensions | 3 × 3 × 6 in |
| Size | 68mm, 73mm, DUB Mtn, DUB Road |
