The featherweight 6061 alloy CNC’d Calculated R Series mini chain tensioner is for 10mm or 3/8″ axles. Available in a large range of colours and it features a single adjustment bolt for reduced weight, that’ll keep the Factory Mums and Dads happy.


For 10mm or 3/8″ axles
Available in Black, Red, Blue, Pink, Purple, and Gold
Stainless Steel Hardware
CNC’d from 6061 Alloy
Machined In Santa Cruz California
Lifetime Replacement Guarantee
Check out the embedded video to see BMX Ultra chatting with Casey Robinson from Calculated Racing.
SKU 81CAMINI
Brand Calculated Racing