Order Form:

Speed Drive (£275)
or  Mountain Drive (£275)
or  High Speed Drive (£275)

Mountain Drive only:

The Mountain Drive is available with a standard torque arm on the right, or with conical cups. The standard arm lets you fit the unit without any machining of the bottom bracket shell, but it needs a “normal” chainstay to bolt to.
Alternatively, the conical cups let you fit the unit to anything, but they do require machining of the bottom bracket shell. For the Speed Drive and High Speed Drive, only conical cups are possible.

Please select:  Standard torque arm   or  Conical Cups

Speed Drive and Mountain Drive only (High Speed Drive has 29t ring only):

Price includes cranks, and chainring of your choice - chainring size:

Accessories:

• Adapter for larger BB shell diameters (only for MD with torque arm) - please specify the size. £10
• Cargo version of the MD - steel spider with 8 bolts. Recommended for tandems, rickshaws and double or triple rings. £15
• BCD130 spider for the High Speed Drive. £25
• Brompton version of the MD with special torque arm. £8
• Longer axle for BB shells from 73-84mm. £25

Special Chainrings:

• Extra charge for 50, 52, 53t (BCD110) - £10
• Extra charge for 54, 56t (BCD130) - £13
• Extra charge for 34-53t rings with BCD130 - £14
• Extra charge for CNC milled 7075 34-48t rings - £20
• Extra charge for CNC milled 7075 50-60t rings - £32
• Extra charge for CNC milled 7075 65-70t rings - £47
• Extra charge for 30, 34t hardened steel rings for HSD - £24

Special Crankarms (prices per pair):

• Extra charge for 152, 175, 170 offset arms - £17
• Extra charge for 165, 172.5 offset arms - £25
• Extra charge for 89, 102, 114, 127, 160 arms - £17
• Extra charge for black-anodised arms - £5

Optional extras:

• Easyshift levers - £20
• Trouserguard for 34, 36, 38, 40 ring - £20
• Trouserguard for 27, 42, 44, 46, 50 ring - £25
• Trouserguard for 52, 53, 54, 56 ring - £30
• Trouserguard for HSD 30, 34 ring - £40
• Tool set - £25

Milling cutter:

If you order the Speed Drive, High Speed Drive, or Mountain Drive with conical cups, you need to machine a 45-degree miter into the bottom bracket shell. There are several options for doing this:

• Get us to do the fitting - we charge £15 to fit the unit. We can arrange shipping if you are too far from Glasgow to bring your bike in person.
• Find a good local bike shop with a 45-degree mitering tool - they are quite rare, though ;-)
• Buy the cutting tool - £150
• Borrow the tool - we charge £150 to your card, and refund it when we get the cutter safely back. Borrowing fee - £5