cound the # of teeth on the ring, then the # of teeth on the pinion, and that ratio is your gear ratio. how well should my d35 hold up to the new 33s? i was wanting to go play this weekend but i dont have any money left to fix it if i break it so i need to know how gentle to be on it. the shop called me today and told me that they ran into some problems on the rear. he said the front went on fine, then they broke off 2 bolts in the rear uniframe, and they were having quite a time getting it done so it wont be ready to pick up till tommarow.i think i can wait another day so its not that big of deal.