I
Irish John
Guest
After about a week of fairly low useage of the G4/HS kit described in another thread where I attempted to install it on a Grubee GT1 Cruiser bike I have to report that the freewheel drive sprocket has chewed itself to pieces. The pawls have ripped the ratchets to pieces carving through them like butter so in the end it freewheels in both directions and drives in neither.
The problem is that the power take-up from the new belt driven G4 (this is the model without the engager) is too strong or the metal forming the ratchets in the outer cluster is too soft and the attached pictures clearly show the result of a about 130 kms of useage.
This, added to all the other defects mentioned elsewhere, makes for a really disappointing experience of the total product.
I'm not sure how this can be fixed and even if there is a non-freewheel fixed sprocket that might work (which I think there is) it has only 10 teeth and the problem with the GB is that the 11tT isn't big enough anyway. With a 10T front drive sprocket youd need something like a 24T rear and that is impractical for obvious reasons. The sprocket needed to match the 11T is a lot (and I mean a lot) smaller than the kit comes with. What the correct size should have been is something Grubee should find out for themselves because I do not feel inclined to tell them without being rewarded in some way that fully compensates me for the many too large sprockets I've had to buy with numerous kits to date.
The G4 is really a back to the drawing board case.
The problem is that the power take-up from the new belt driven G4 (this is the model without the engager) is too strong or the metal forming the ratchets in the outer cluster is too soft and the attached pictures clearly show the result of a about 130 kms of useage.
This, added to all the other defects mentioned elsewhere, makes for a really disappointing experience of the total product.
I'm not sure how this can be fixed and even if there is a non-freewheel fixed sprocket that might work (which I think there is) it has only 10 teeth and the problem with the GB is that the 11tT isn't big enough anyway. With a 10T front drive sprocket youd need something like a 24T rear and that is impractical for obvious reasons. The sprocket needed to match the 11T is a lot (and I mean a lot) smaller than the kit comes with. What the correct size should have been is something Grubee should find out for themselves because I do not feel inclined to tell them without being rewarded in some way that fully compensates me for the many too large sprockets I've had to buy with numerous kits to date.
The G4 is really a back to the drawing board case.