ZTTO Passaggio cavi interni bicicletta He 52 56 28.6 30mm IS52 ZS56 Forcella conica 1.5" 28.6mm Cambio Tubo freno nascosto

ZTTO Bicycle Threadless Internal Cable Routing Headset Material: CNC-machined 6061 aluminum with chromoly steel seal bearings. Cable hole: 4mm x2 , 5mm x2 Compatible with 1 1/8" and 1 1/2" fork Bearings angle: 45°/45° Bearings Size: 52x40x7 Cable hole angle: about 30° (soft rubber Compression Ring for IS52: 6.5/7.5/8.5mm Weight: N5252ST about 110g, N5656ST about 140g SHIS(Standard Headset Information System) N5252ST= IS52/28.6, IS52/40 (with 30 adapter ) N5256ST=IS52/28.6,ZS56/40(with 30 adapter ) N5656ST=ZS56/28.6,ZS56/40(with 30 adapter ) 3 Compression Ring Thicknesses (6.5mm / 7.5mm / 8.5mm) For IS52 for perfect frame-crown gap tolerance. Come with 0.3mm and 0.5mm Shims to fine-tune stack height ±0.7mm. Critical: Measure your frame’s depth before choosing ring thickness (see diagram in images). IF YOUR FRAME IS ZS56, then Ignore this description, ZS56 just works with bearing cups, no need to choose compression Ring. Positioning Pin Optimized Angled Ports about 30° (soft rubber) slanted entry ports minimize cable drag for responsive shifting.