VehiclesTeam Associated SR7 Hoonicorn RTR

Team Associated SR7 Hoonicorn RTR

1/7 scale · street and speed-run body · 20540

Tire: 109mm

Open in Top Speedsourced

Team Associated SR7 Hoonicorn RTR — Photo: Team Associated

Specifications

Last modified Sep 25, 2026

Spec	Value	Basis
Drivetrain
Pinion	Not published
Spur	45TStock	Stock
Transmission & axle	2.92:1Stock	Stock
Final drive	Not published
Wheels & tires
Tire diameter	109mmStock	Stock
Wheel hex	17 mmStock	Stock
Power
Motor	2100KVStock	Stock
Motor shaft	Not published
Battery	Up to 6SLiPoStock	Stock
Stock motor	Reedy 685-SL4 2100kV brushless motorStock	Stock
Battery connector	T-typeStock	Stock
Performance
Theoretical top speed	Not published
Chassis
Length	711 mm28 inStock	Stock
Width	343 mm13.5 inStock	Stock
Wheelbase	413 mm16.3 inStock	Stock
Diff oil, front	10KStock	Stock
Diff oil, center	100KStock	Stock
Diff oil, rear	10KStock	Stock
Shock oil, front	80 wtStock	Stock
Shock oil, rear	80 wtStock	Stock
Vehicle
Part number	20540
Scale	1/7
Class	Street and speed-run body

Stock is as the vehicle ships. Calculated is worked from the stock figures on this page rather than stored beside them, so the two cannot drift apart. Not published means it exists but no source we could find prints it.

Gearing parts

Pinion and spur parts for the Team Associated SR7 Hoonicorn RTR: fitted, and optional gearing supplied in the box
Component	Teeth	Pitch	Bore	Part number
Fitted at the factory
Pinion	Not published	Mod 1	Not published	26020 (opens in a new tab)
Spur	45T	Mod 1	Not applicable	26013 (opens in a new tab)

Tooth counts are the ones in the specifications above. Pitch is given as metric module (Mod 1, Mod 0.8) or diametral pitch (32P, 48P). They are different standards and are not interchangeable, even where the numbers look close. Bore is the pinion’s hole, listed separately from the motor shaft. Linked part numbers go to the maker's or official distributor's page for that part.

How these numbers were settled

The stock pinion is left blank because two maker documents disagree.

The RTR manual labels the fitted pinion (part 26020, p. 20) as 14T, and its gear chart (p. 25) marks 14T on the 45T Mod 1 spur as included, at 9.396:1.
The RTR parts list (April 2024) and the part's own page name 26020 as a 15T Mod 1 pinion supplied with the car and list the 14T (26078) as an optional part; the chart gives 8.760:1 for 15T.
Both documents agree on the 45T Mod 1 spur (26013) and the 2.92:1 internal ratio, which the product page and press release also print.
The maker's tire and wheel part (26017) gives a 109mm tire diameter on 17mm hexes.
The Reedy 685-SL4 2100kV motor runs on two 2S or 3S LiPo packs in series, 4S to 6S; the manual's gearing advice assumes 4S.
The product page names the speed control as the Reedy SC 1500-BLC while the linked speed control sheet is for the SC-1400BL, so the speed control model is left blank; both are given as 4S to 6S.
The front and rear differentials take 10K diff fluid and the center 100K; the shocks take 80wt oil.
The roller (20540ROL) is the same chassis sold without electronics.

Documents

ManualSR7 Hoonicorn RTR instruction manual (Associated PDF) (opens in a new tab)Diffs pp. 7-8, pinion p. 20
Gearing chartSR7 gear ratio chart, in the RTR manual (Associated PDF) (opens in a new tab)p. 25
Parts listSR7 Hoonicorn RTR parts list (Associated press release PDF) (opens in a new tab)Spur 26013, pinions 26020 and 26078, p. 2

Sources

Every figure on this page traces to one of these. Where they disagreed, the note above says which was used and why.