Review on MKS Track Chain Tensioners: Secure 10mm Axle Adjustment Solution! by Jon Bishop

TIP: The round bit that goes through the axle goes INSIDE the chain, not out like many tensioners do - that's why it does slim. This is the size (5mm) for a typical steel frame; If you have an aluminum frame, check out the CA-MX10 (8mm) or CA-MX14 (8mm with a 14mm axle). Also, unlike most spanners, they ONLY use a 3mm hex wrench, so you don't need to carry an extra box wrench when you travel if you already have a general-purpose tool. Simply use 3mm to properly tension the chain and align the wheel, tighten the axle, then gently squeeze the tensioners. hub ends.