Tamiya 50390 - RD 3645 Rear Sponge Tire for F103/103GT Track Spec [50390]

Tamiya 50390 - RD 3645 Rear Sponge Tire SP-390

Price:

CAD$14.33

Brand:

Tamiya

Model:

50390

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Spares / Hop-ups - Tamiya - F103

Rear Sponge Tire Upgrade for F103/103GT

The Tamiya 50390 - RD 3645 Rear Sponge Tire is a focused upgrade built for Tamiya F103 and 103GT chassis. Favoured by club racers, this rear sponge tyre provides reliable traction on smooth indoor and sealed circuits while maintaining stable handling at speed.

Performance Highlights for the 50390 Rear Sponge

Compatibility: Built to suit Tamiya F103 and 103GT chassis layouts.
Material: Dense sponge compound chosen for strong bite on flat tracks.
Performance: Improves traction and directional stability during high speed runs.
Durability: Constructed to resist rapid wear and give consistent laps.

Will these tyres fit other Tamiya kits?

They are optimised for the F103 and 103GT platforms. Other models with similar wheel diameter and offset might accept them, but fitment should be checked before use.

What surfaces suit sponge tyres best?

Sponge tyres perform best on smooth carpet and sealed asphalt where the compound can maintain contact and deliver steady grip without excessive chatter.

How can I extend tire life?

Keep tyres clean from oil and debris, mount them squarely on rims, avoid abrasive surfaces, and rotate tyres where applicable to even out wear.