Description
This ARRMA CNC-machined 13-tooth pinion gear in MOD 0.5 pitch with a 2.3mm bore is a replacement and gearing-tune option for the GROM platform. The pinion is the small gear on the motor shaft that drives the spur — the single cheapest way to change how a truck accelerates and tops out.
CNC machining from metal delivers precise tooth geometry for a smooth, quiet mesh with the GROM's 0.5 MOD spur gears, and far better wear life than molded pinions. The 2.3mm bore matches the GROM motor shaft, secured with the setscrew.
As the smallest pinion in the GROM range (13T–21T), this is the torque option: harder acceleration, better wheelie response, and cooler motor temperatures at the cost of top speed — the right pick for tight spaces and grass.
Fitment is the ARRMA GROM platform including the Quake GROM. The package includes one 13T MOD 0.5 CNC pinion gear.
Shipping & Return
Shipping Costs By Region
Shipping to the Contiguous United States (excludes Alaska and Hawaii)
As an added benefit, customers in the continental United States can also take advantage of our economical Basic Economy shipping option which offers FREE Shipping on orders over $75 is automatically offered at checkout. If your order does not reach the $75 threshold for free shipping, we offer Flat Rate $3.99 Shipping.
NOTE: Free shipping is only available when shipping to an address in the Contiguous United States, this excludes Alaska, Hawaii and Puerto Rico.
Shipping to Alaska, Hawaii, Puerto Rico, Guam, and All International Addresses
Basic Economy Free Shipping is not available to residents of Alaska, Hawaii, Puerto Rico, Guam, and international. Customers in these locations will be charged the actual computed shipping rate at the time of checkout.
Customs Fee for International orders:
- You are also responsible for all customs, duties, taxes and fees that may be charged by your customs.
- We cannot list any amount other than the actual amount paid by you on invoices or customs forms.
Ordering Processing Time
- All orders are shipped within 24hrs. M-Sat.
RETURNS:
- We accept returns within 30 days of purchase.
- Returns must be in it's original condition.
- Buyer is responsible for return fees.
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