The 54mm chain-line of older 15/16/17 tooth sprockets will be moved with Carrier #8540 out to 57mm (position of outermost chainring on modern triple cranksets).
The belt-line with carrier Lock #8540L of a Carbon Drive transmission remains 55mm (+/-1mm) as before.
Art. #8540 Splined Sprocket (O.L.D. 135/142) 13-14-15-16-17-18-19-21 = chainline 57mm
Art. #8540s (small) Splined Sprocket (O.L.D. 135/142) 15-16-17-18-19-21 = chainline 55mm
Preparation: Slide the reversible splined sprocket fully over the clean carrier so that it lies against the polished seal rub-ring. Snap the circlip over the carrier by hand ensuring this sits correctly in the carrier seat.
Check the sprocket is tight. Lightly grease the threads of the splined carrier.
Clean any foreign particles from the seal lip and driver with a clean cloth.Slide the preassembled sprocket/ carrier unit carefully over the remover tool (as a locating guide) and then fully down onto the driver.
Secure the pre-assembled sprocket/carrier unit tightly in position with a chainwhip (in the direction of travel/ clockwise). Mount the wheel back into the frame and check the chain/belt tension - adjust if necessary.
Check the smooth/light motion of the sprocket by rotating this backwards. If you notice excessive resistence, then the free-floating (sprocket side) bearing may rest under tension and will need to be loosened.
Do this by thumping each axle stub with a plastic mallet (sprocket side once, then gearmech side once). Sprocket must now rotate backwards smoothly with little resistance.
The sprocket remover tool #8508 (with adapter and bolt) must be used for all 142/177mm O.L.D. SPEEDHUB Units.
The original sprocket remover tool (Art. #8501) can only be used with 135/170mm O.L.D. SPEEDHUB Units..
Sprocket remover tool Art. #8509 must be used (with an A12 adapter and bolt) for all 148/190/197mm O.L.D. XXL SPEEDHUB units.