The truvativ mtb 32t chainring a truvativ 32 tooth 4 bolt mtb bike chainring made of aluminium a super tough and long lasting inner chainring 104 mm bolt circle diameter bcd you can grace your bike with the benefits of single ring good quality long lasting ring available in hard black colour truvativ mtb 32t chainring features 4 bolt chainring made of aluminium 32 tooth for 104 mm bolt circle diameter bcd a super tough and long lasting inner chainring available