TAMIYA pinion gear set are subject to wear and tear due to prolong usage. Previously I am using TAMIYA TT-01D with stock gearing 19T pinion and 61T spur and now the pinion had worn out. I buy this TAMIYA (#50356) 20T, 21T AV Pinion Gear Set from RCMART and using 20T now. My TT-01D drifts well on the carpet track and surprisingly silent. I recommend this set because if you buy the 18T, 19T AV Pinion Gear Set, you only have to use the 19T pinion and left 18T unused. Meanwhile both 20T and 21T AV Pinion Gear still can match with stock 61T spur gear. Thanks RCMART for the reasonable price.
These Tamiya pinion set are easy to use.. if you are got to look at getting bigger tires or changing your motor I would suggest getting a couple of sets of pinions so that you can play with different settings so that you are getting the most out of your setup without getting the motor to hot
Purchasing this pinion gear set, along with a set of spur gears for your chassis is a great way to improve acceleration or top speed of your RC car. I purchased every pinion gear from 19t to 25t for use in my TT-01, as well as the 55T and 58T spur gears. Using these gears has allowed me to perfect my gear ratio for my style of racing and the motor that I use.
I recommend you also purchase other pinion gear sets just like i did:
Tamiya (#50357) 22T, 23T AV Pinion Gear Set
Tamiya (#50477) 24T, 25T AV Pinion Gear Set