Chain slap is one of those small annoyances that wears on you. These Alienation Circle Jerks tensioners hold your rear wheel where you set it, so the chain stays at the tension you gave it.
They are a solid, non-adjustable design that works with any frame, chain and chainring combination, built from 6061-T6 alloy and finished in black. Sold in pairs for 14mm axles.
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