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e. thirteen

·  DRS: Dual-Ring-Security FR/shifting chain guide system

·  Stepped, lower roller/guide mounts to aluminum arm and works with 13mm Makrolon thermoplastic bashplate to eliminate chaindrop under dual-ring shifting

·  Patent Pending, sealed bearing, stepped Flip-Flop roller: two diameters act as large-inner; small-middle chain retention (even when backpedaling)

·  Clears all standard and elevated chainstays

Mount BB

Note: Crank and Chainrings not included

4 Bolt 104mm BCD 40t Max, BB Mount.

e-thirteen part no. DRS-40-104C

$115.00 US Dollars