For my next build I am looking at gear options and thought I might put a Nexus Inter 8 behind the GSM kit. The bike is a 28" wheel I think I will be running 50-622 Big Bens on them. As the bike has vertical drop-outs I will be using the Alfine chain tensioner.
As I have lots of long up-hills which are often followed by long down-hills (doh!) I am considering mounting two chainwheels on a spider mounted to the motor. The most common options are 50/38 and 52/42.
Reading the Shimano dealer manual they recommend a 2.1 gear ratio. With the standard GSM 46 tooth that means mounting a 22 tooth sprocket in back. If I mount my preferred 52/42 option the 42 will work with a 20 tooth sprocket but the ratio with the 52 tooth will be 2.6.
Question: will this damage/ increase wear on the hub after taking into consideration that I will be using the big sprocket on downhill and flat roads (with no wind or tailwind) only? A lot of my riding will be done with the 42 tooth chainwheel which just happens to be in the direct ratio gear at cut off speed in cadence!
I am not allergic to derailleurs I just though I would try something different.
As I have lots of long up-hills which are often followed by long down-hills (doh!) I am considering mounting two chainwheels on a spider mounted to the motor. The most common options are 50/38 and 52/42.
Reading the Shimano dealer manual they recommend a 2.1 gear ratio. With the standard GSM 46 tooth that means mounting a 22 tooth sprocket in back. If I mount my preferred 52/42 option the 42 will work with a 20 tooth sprocket but the ratio with the 52 tooth will be 2.6.
Question: will this damage/ increase wear on the hub after taking into consideration that I will be using the big sprocket on downhill and flat roads (with no wind or tailwind) only? A lot of my riding will be done with the 42 tooth chainwheel which just happens to be in the direct ratio gear at cut off speed in cadence!
I am not allergic to derailleurs I just though I would try something different.
