SWB MARATHON PLUS 20x1.75 PERF TWIN SM-GUARD BK/BK/REF ENDURANCE E50 WIRE RIMS External English (BSA) threaded bottom

External English (BSA) threaded bottom bracket for 68/73mm shells

Cold forged for improved strength

For replacing OEM PF30 bottom brackets or for new bike builds

Available in 26`/700c models as well as 29` specific model

Designed to survive years on the road touring

SWB MARATHON PLUS 20x1.75 PERF TWIN SM-GUARD BK/BK/REF ENDURANCE E50 WIRE RIMS External English (BSA) threaded bottomDurable all weather urban tread Features Schwalbe`s 5mm SmartGuard belt EBIKE50 has achieved a passing rating for use with E Bikes up to 50kph and is ECE R75 approved SGRD Smartguard equipped tires feature a 5mm breaker belt made from special Indian and partially recycled rubber REF Reflective sidewall striping or hotpatch to aid in low light visibility *Please note that EBike rated tires also can be used with non Ebikes and are generally more durable