37 Manchester St, Christchurch, New Zealand. 03 374 6000

Pinion Gear SP (8,9,10,11,12T) /10pcs

Pinion Gear SP (8,9,10,11,12T) /10pcs
  • Brand: Scalextric
  • Product Code: SCA C8402
  • Availability: Out of Stock
  • NZ$24.70

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Gear Ratios for Sport+ Gears

Pinion   Spur          Ratio:
Gear:    Gear:
INLINE MOTOR
8            29            3.625:1
9            28            3.111:1
10          27            2.700:1
11          26            2.364:1
12          25            2.083:1

SIDEWINDER
8            38            4.750:1
9            37            4.111:1
10          36            3.600:1
11          35            3.182:1
12          34            2.833:1

The gear ratios on the chart are the ideal mesh between the pinion and crown or spur gear. On cars with inline motors the separate collar with blue insert controls the gear mesh so you can obtain  an acceptable mesh with a crown gear with one more or one less tooth than “ideal”. The standard Scalextric gear ratio for inline “SP” motored cars is 3.000:1 (a 9-tooth pinion and 27-tooth crown gear). The ideal gear mesh allows the rear axle move about .005-inches (the thickness of regular paper) from side to side AND the axle should be able to rotate back and forth about twice that tiny distance without any pinion gear movement.
There is no way to adjust the gear mesh with sidewinder motors because the distance between the rear axle and motor shaft is fixed. Cars with sidewinder motors should only be geared with combinations shown which should produce the “ideal” gear mesh if you adjust the rear wheels in or out allow only the .005-inches of side-side rear axle movement. The standard Scalextric gear ratio for sidewinder chassis with “SP” motor is 3.270:1 (an 11-tooth pinion and a 36-tooth spur gear) but the 11/35 set of gears (3.182:1) should offer comparable performance to the standard Scalextric sidewinder

  • The Sport + range of spares provides everything you need to fine tune a Scalextric car to get the maximum performance from it on the track.

    These Sport + pinion gears are suitable for use with most standard Scalextric SP motors (18,000 rpm) as well as the yellow C8421 (20,000 rpm), orange C8422 (25,000 rpm) and blue C8423 (30,000 rpm) replacement SP motors.

    Contains 8, 9, 10, 11 and 12 tooth gears.