Every part on this page is an option or upgrade part for the Arrma Infraction and Arrma Felony, not a stock replacement. Each one has been checked against the fitment list on the retailer’s own product page and fits both cars. They are grouped by the thing that breaks. Prices were current when this page was built and will drift.
The Infraction and Felony share a chassis with the Arrma Limitless, so most of these fit that car as well. Stock spare parts for both cars are linked from the model pages.
Steering
The steering assembly is the first thing to break on a 1/7 car. A curb strike loads the rack, the plates and the servo horn before it ever reaches the arms.
| Part | Brand | Price | Why you buy it |
|---|---|---|---|
| Arrma EXB Aluminum Steering Rack (Red) | Arrma | $22.99 | The main upgrade. The stock rack flexes under a hard curb hit and never comes back straight |
| Treal Hobby Arrma 6S BLX 7075 Aluminum Front Steering Knuckle Set | Treal Hobby | $42.98 | Replaces the composite knuckles that snap in a front-corner impact |
| Arrma Aluminum "A" Steering Plate (Red) (2) | Arrma | $6.99 | Cheap, and the plate it replaces bends before anything else does |
| Arrma Aluminum "B" Steering Plate (Red) (2) | Arrma | $11.99 | The other half of the same job |
| Arrma Aluminum Servo Horn (Black) | Arrma | $18.99 | A stripped plastic horn is the quiet cause of vague steering. Check yours before buying a servo |
| Arrma 6S BLX Aluminum Servo Saver Hub Set (Black) | Arrma | $7.99 | Metal hub for the servo saver, so the saver still does its job after a few hits |
| Arrma 3x45mm Steel Steering Post (2) | Arrma | $8.99 | Steel posts for the rack. Inexpensive and they stop flex at the pivot |
Hubs and axle carriers
Rear hubs take the load in every landing. These are the parts owners replace second, after steering.
| Part | Brand | Price | Why you buy it |
|---|---|---|---|
| ST Racing Concepts Arrma 6S BLX Aluminum Rear Hub Carriers (Gun Metal) (2) | ST Racing Concepts | $25.99 | The common rear hub swap, and the cheapest metal option that fits |
| Treal Hobby Arrma 6S BLX 7075 Aluminum Rear Hub Set (Black) (2) | Treal Hobby | $42.98 | Heavier duty than the ST Racing set, bearings included |
| Hot Racing Arrma Aluminum "HD Bearings" Axle Carriers (Black) (Legacy) | Hot Racing | $49.88 | Front carriers with the larger bearings, which is the actual failure point |
| Hot Racing Arrma 6S Aluminum Rear Hubs w/Heavy Duty Bearings (Black) (2) | Hot Racing | $49.88 | Rear equivalent of the same fix |
Driveline
Titanium hybrid driveshafts are the option-parts category that barely exists anywhere else for this platform. Method RC lists these specifically for the Arrma 1/7 on-road cars.
| Part | Brand | Price | Why you buy it |
|---|---|---|---|
| Method RC Titanium 124mm Front/Rear Hybrid CVD (2) (Arrma 1/7 On-Road) | Method RC | $64.99 | The full front or rear CVD pair. The most expensive item here and the one that ends driveshaft failures |
| Method RC Titanium 94mm Front/Rear CVD Axle Shaft (2) (Arrma 1/7 On-Road) | Method RC | $36.99 | Axle shafts only, if your cups are still good |
| Method RC Titanium Front/Rear CVD Stub Axle (2) (Arrma 1/7 On-Road) | Method RC | $23.99 | Stub axles, the cheaper half of the same repair |
| Method RC Titanium 168mm Center-Rear Hybrid Driveshaft (Arrma 1/7 On-Road) | Method RC | $21.99 | Center rear shaft |
| Method RC Titanium 102mm Center-Front Hybrid Driveshaft (Arrma 1/7 On-Road) | Method RC | $15.99 | Center front shaft |
| Arrma Steel Differential Outdrive (2) | Arrma | $12.99 | Steel outdrives, which round off long before the diff itself wears |
| Hot Racing Arrma 6S 7x18mm Steel Input Shaft Cup | Hot Racing | $8.88 | Input cup for the gearbox, a cheap part that fails under 6S power |
Shock towers and shocks
Both cars run big shocks and a lot of unsprung weight. The towers crack at the mounting holes.
| Part | Brand | Price | Why you buy it |
|---|---|---|---|
| Arrma Infraction/Limitless Aluminum Rear Shock Tower | Arrma | $22.99 | Direct fit rear tower from Arrma, no cross-referencing needed |
| Hot Racing Arrma Limitless/Infraction Aluminum Front Shock Tower (Black) | Hot Racing | $19.88 | Front tower, Hot Racing |
| Arrma 16x36mm Aluminum Infraction/Limitless Front Shock Body (2) | Arrma | $28.99 | Aluminum shock bodies front. A dented body is a leaking shock |
| Arrma 16x41mm Aluminum Infraction/Limitless Rear Shock Body (2) | Arrma | $28.99 | Rear pair of the same |
| Hot Racing Arrma Limitless Aluminum Bleeder Shock Caps (2) | Hot Racing | $16.88 | Bleeder caps make rebuilds far less annoying |
| Hot Racing Arrma 6S Locking Aluminum Shock End (Black) | Hot Racing | $16.88 | Locking shock ends stop the rod ends popping off on a big landing |
Chassis and braces
These are stiffness parts more than durability parts, but the front brace and the diffuser supports both take direct hits.
| Part | Brand | Price | Why you buy it |
|---|---|---|---|
| Hot Racing Arrma 1/7 Aluminum Front Chassis Brace (Black) | Hot Racing | $28.88 | Front brace, sized for the 1/7 cars specifically |
| Hot Racing Arrma Limitless/Infraction Aluminum Rear Chassis Brace (Black) | Hot Racing | $28.88 | Rear brace |
| Xtreme Racing Arrma 6S 3mm Carbon Fiber Front Brace | Xtreme Racing | $19.99 | Carbon alternative to the aluminum front brace, lighter |
| Hot Racing Arrma Limitless/Infraction Aluminum Diffuse Supports (Black) | Hot Racing | $39.88 | Diffuser supports. The plastic ones break on the first tumble |
| Hot Racing Arrma Limitless Aluminum Rear Body Mount Support | Hot Racing | $33.88 | Rear body mount support |
Suspension mounts and hardware
Arrma does not sell aluminum A-arms for these cars and nobody else makes them either, so the arms stay composite. The mounts they pivot in are the part you can upgrade.
| Part | Brand | Price | Why you buy it |
|---|---|---|---|
| Arrma EXB Aluminum Front Upper Suspension Mount (Red) | Arrma | $22.99 | Front upper mount, sets camber link geometry and takes the load in a nose-in hit |
| Hot Racing Arrma 1/8 Aluminum Front/Front Suspension Arm Mount | Hot Racing | $18.88 | Front inner mount |
| Hot Racing Arrma 1/8 Aluminum Rear/Rear Suspension Mount | Hot Racing | $18.88 | Rear inner mount |
| Arrma 17mm Aluminum Wheel Hex (Black) (2) (14.6mm) | Arrma | $9.99 | Correct 14.6mm width for the 1/7 cars. Getting this wrong is a common mistake |
| Arrma Aluminum Front Hub Nut (Red) (4) | Arrma | $12.99 | Hub nuts, four of them, cheap insurance |
| Arrma 5x50mm Steel Turnbuckle (2) | Arrma | $6.99 | Steel turnbuckles, which do not twist like the stock ones |
| Hot Racing Arrma 6S 3x7.8x10.5mm Steel Chrome Pivot Ball (Chrome) (4) | Hot Racing | $8.88 | Chrome pivot balls, the wear item inside every rod end |
Some links on this page are affiliate links that support the site. They cost you nothing extra.
