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TSRF question

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#1 BackAgain


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Posted 07 July 2009 - 11:09 AM

Since I don't compete in any organized racing competitions, I enjoy modifying my cars to make them go a little faster or, just to look better....to me anyway. I doubt any of my cars would make it within 20' of the scrutineers table so maybe my opening comment should be reversed.... :blink:
I have Fly cars with Slot.It motors, guides, axles and gears....Slot.It cars with NSR 30 motors, F1 wheels and tires, even a Scaley with an NSR 30 motor....it's going to get a TSRF motor when I can find one....
I have mounted a Slot.It Porsche 956 body on one of my TSRF chassis but I want to fit wider rear tires....and there lies my problem.
I tried a set of Slot.It SIPA 20 wheels and tires but the spur gear hits the track surface. The spur gear seems to be a larger diameter than the Slot.It spur gear....I haven't measured them though....

My first question is, will a Slot.It sidewinder spur and pinion set fit the TSRF or is the motor/axle center distance different?
Alternatively, are there wider wheels and tires (rubber) available for the TSRF that are a similar OD to the originals?....I do have some concern that a smaller diameter tire such as the F1 style may result in the chassis hitting the track.
Paul Tisdale
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#2 Ramcatlarry


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Posted 07 September 2009 - 11:00 PM

The TSRF gears are 64 pitch common in the USA. You CAN get different ratios that what is offered by checking out the drag gear selection from Sonic and Slick-7. Drag pinions are thinner and lighter also. All 64 pitch in these groups change root diameter with the number of teeth, so if you go up a tooth on the pinion, you go down a tooth oh the spur. This is not exact among the brands and you may be able to get a unique ration with different brands. Fit and backlash are critical.

Since the axles are 3/32" tires can be custom made from a wide variety of 1/24 scale tires if you are running on wood tracks. If running on plastic, stick with silicone type, different rims from SCX and Slot-it among others are 3/32". Some 1/32 rims are oversize 2.5mm (0.098").

Larry D. Kelley, MA
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#3 TSR


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Posted 08 September 2009 - 09:28 AM

Also you will need to remove a small amount of plastic at the very bottom of the right-side radiator vent on the body to clear the pinion. :)

Philippe de Lespinay

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