Booda Bike Eccentric BB – 30 mm axle
The Possible eccentric bottom bracket for a 30 mm crank axle is the complete kit for the bottom bracket of a Booda Bike frame with the FSA SL-K Carbon crank: its own left and right eccentric shells, a centre tube, 6806 bearings, dust covers, O-rings and bolts, turned to set the belt tension.
What is in the set
| Part | Qty |
|---|---|
| Eccentric BB shell, left, with holes | 1 |
| Eccentric BB shell, right, with threads | 1 |
| Centre tube, aluminium, Ø40 mm | 1 |
| O-ring, Ø34 mm | 2 |
| Bearing 6806, 30 × 42 × 7 mm | 2 |
| Dust cover, rubber and aluminium, Ø30.1 mm | 2 |
| Bolt | 3 |
Why the 30 mm version?
For the carbon crank. The FSA SL-K Carbon crank has a thicker axle than the standard aluminium crank, so its eccentric needs bearings with a 30 mm bore.
Belt tension without sliding dropouts. A Booda Bike has vertical rear dropouts, so the belt tension is set at the bottom bracket instead.
Its own parts, the same handling. The shells, the centre tube, the bearings, the dust covers and the O-rings are made for the 30 mm axle; the three bolts and the way you set the tension stay the same as on the standard kit.
Tool and bearings sold separately. The Booda Bike eccentric BB tool and the 30 mm bearing and dust cover set are separate products.
The 30 mm bearings
The two sealed 6806 bearings (30 × 42 × 7 mm) carry the axle of the FSA SL-K Carbon crank. They are 42 mm across, larger than the 37 mm 6805 bearings of the standard kit, so they sit in shells made for them, each with its own dust cover. The three bolts on the non-drive-side cap lock the eccentric in position, tightened to a maximum of 5 Nm.
Who is it for?
- Carbon crank upgraders. Booda Bike owners fitting the FSA SL-K Carbon crank, who need the eccentric that matches its 30 mm axle.
- Builders and workshops. Who build up a Booda Bike frame with the carbon crank and want the full eccentric kit in one product.
Specifications
| Product | Eccentric bottom bracket full kit, 30 mm axle |
|---|---|
| Shells | Left, with holes; right, with threads |
| Bearing | 6806, 30 × 42 × 7 mm (bore × outer diameter × width) |
| Centre tube | Aluminium 6061, Ø40 × 72 mm |
| Bottom bracket shell width | 86.5 mm |
| Bolts | 3, tighten to a maximum of 5 Nm |
| For | Booda Bike frames with the FSA SL-K Carbon crank |
| Tool | Booda Bike eccentric BB tool (separate product) |
Frequently asked questions
Which eccentric bottom bracket do I need for the FSA SL-K Carbon crank?
This one. The carbon crank has a 30 mm axle, so the eccentric needs 30 mm bearings. For the standard aluminium crank, choose the standard Booda Bike Eccentric BB.
What is the difference from the standard kit?
The standard kit is made for the 24 mm axle of the aluminium crank, with 6805 bearings (25 × 37 × 7 mm). This kit has its own shells, a wider centre tube, 6806 bearings (30 × 42 × 7 mm), its own dust covers and O-rings. The three bolts are the same.
How tight should the cap bolts be?
Tighten the three bolts on the non-drive-side cap evenly to a maximum of 5 Nm, as Booda Bike's guides say, and check the belt tension afterwards.
Can I replace only the bearings?
Yes. The two 6806 bearings and two dust covers are also sold as a separate set for the 30 mm axle.
About Booda Bike
Booda Bike builds belt-driven bicycles around steel frames, with Gates Carbon Drive belts and gear hub or single-speed drivetrains. The range includes the Banker, Hiker, Alpine, Atlas, Pulse and Sander models.
The components are standardised so that Booda Bike bicycles can be serviced at ordinary workshops, and parts like this one are also sold separately in the Booda Bike webshop.
Possible is Booda Bike's own component range, used on Booda Bike bicycles and also sold separately.