Just have to agree with Jan Larsen, the normal drive belt (53987) and the Reinforced Drive belt (54140) will both fit on the Tamiya DB01, DB01R, TRF501X, TRF501X WE, TRF511.
I highly recommend to use the reinforced one. even the normal one seems to last forever but the reinforced one has the advantage that it doesnīt get that much longer as the normal belt does. After a few runs you might have to adjust the normal belts tension but i never had to adjust the reinforced one, thatīs all.
Length and tooth profile is the same.
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