SRAM Force 2x Chainring Kit - 50/37t 2x12-Speed 8-Bolt Direct Mount Black E1SRAM Force 2x Chainring Kit 50 37t 2x12 Speed 8 Bolt Direct Mount Black E1. SRAM has designed the Force 2x direct mount chainring to be light weight stiff and durable. The Force 2x chainring kit is a single integrated unit so no effort is wasted transferring all your power to the pedals. One piece aluminum construction provides faster smoother more secure shifting Offers crisp and accurate front shifts X Range gearing technology gives you more range