The Macfox x1s is already a head-turner — and with Insane Chains Black & Yellow Two Tone snap-on caps, your chain can stand out too. This best-selling combo blends jet black with bold yellow, creating a high-contrast look that riders notice instantly. It’s the upgrade that makes the Macfox x1s — and any single-speed bike — look unforgettable.
Each box includes 56 pieces for bikes 16 inch and larger, including the Macfox x1s, BMX, SE Bikes, cruisers, and city bikes. Shopping for a kids bike 14 inch and under? Go for the 35-piece size instead. Both options are designed for standard 1/2" x 1/8" single-speed chains, so no matter what you ride, you’ll get a perfect fit.
Installation is fast and easy: line up a cap with a chain link, press until it clicks, and repeat. No tools, no grease, no stress — just a bold two tone chain transformation in minutes.
And it’s not just about looks. Insane Chains protect clothes from chain grease, keeping jeans, shorts, and sneakers clean while you ride. Parents love the practicality, while teens and adults love the confidence of a bike that always gets noticed.
For Macfox x1s riders — and anyone on a single-speed bike — the Black & Yellow Two Tone Insane Chains are the must-have upgrade.
