Sbike 503 is low-cost model, made in steel Tange MTB custom, heaver than 729 aluminium model.
I have brougth this bikes when student, no more money, they are looking great and pleasure to ride with.
Hi
I have a SBIKE 503. I want to restore it in his original condition (full Shimano Altus A10 groupset).
Do you know what saddle and what tires came with it ?