Promax EX-1 Alloy external Sealed Bottom Bracket 68/73mm Black CheckoutTitle=Magura 2-Finger Aluminum Lightweight Lever Blade - For MT eSTOP 2020+ Competition grade derailleur built with

Competition grade derailleur built with carbon fiber and aluminum featuring roller clutch pulley cage and cage lock feature for easy wheel installation

4 ISO Width (mm) 61 ISO Diameter 584 / 650b / 27

Max tire size: 26ΓÇ¥ x 1

For snow temperatures from -8° C to -20° C (18° F to -4° F)

Steel Cogs with shiny weather-resistant finish

Promax EX-1 Alloy external Sealed Bottom Bracket 68/73mm Black CheckoutTitle=Magura 2-Finger Aluminum Lightweight Lever Blade - For MT eSTOP 2020+ Competition grade derailleur built withEX 1 External bottom brackets feature cold forged and CNC machined alloy cups dual labyrinth bearing covers and precision sealed bearings. They are the perfect match to Promax CF 2 and HF 2 cranks and ultimate upgrade to the budget BBs sold with most crank sets. Fits all 24 millimeter bottom bracket spindles and frames with 68 or 73 x BC1. 37 bottom bracket shells Bottom Bracket Shell I. D. 1. 37 BB Frame Interface English BB Shell Width (mm) 73