Product Description The Bomber Z1 Coil 27.5" Boost suspension fork by Marzocchi offers legendary ride quality in a modern chassis With the Bomber Z1 Coil, Marzocchi offers a suspension fork with a specially hardened, super-light silicon-chromium steel spring. The preload of the spring is done by the top cap and is purely there to adapt the sag (negative spring travel) to the rider's weight, but has no influence on the spring rate. In addition to the typical M-crown design, the fork offers a stanchion tube diameter of 36 mm, a travel of 160 mm to 180 mm and Grip damping with adjustable compression and rebound. All forks are supplied with a medium coil. Specifications:Application:All Mountain, EnduroWheel Size:27.5" (650B)Suspension Type:steel coilTravel:170 mm, 180 mmSteerer Tube:1 1/8" - 1.5" taperedAxle Type:thru-axle with quick release lever (15 x 110 mm)Brake Mount:disc PM 7" (direct mount 180 mm)Technical Information:Offset:44 mmSteerer Tube Length:258 mmSteerer Tube Diameter (Stem):28.6 mmSteerer Tube Diameter (Crown Race):40 mmAxle to Crown:559.1 mm (at 170 mm), 569.1 mm (at 180 mm)Over Locknut Dimension:110 mmStanchion Tube Diameter:36 mmSteerer Tube Material:aluminiumCrown Material:aluminiumStanchion Tube Material:aluminiumLower Tube Material:magnesiumDropout Material:aluminiumAdjustment Options:Compression:2-position Sweep Adjust (Open, Firm)Rebound:yesSuspension Stiffness:steel coil adjustRemote:noTravel Adjustment:noApproved For:Tyre Size (max.):27.5 x 2.5"Note:From a tyre size of 27.5 x 2.5" , the tyre clearance must be checked with the fork fully compressed. It should be at least 8 mm measured from the fork crown.Rotor Size (max.):203 mmFeatures:Grip Sweep damping with adjustable rebound and infinitely adjustable low-speed compression stagespecially hardened, super-light silicon-chromium steel springAir Assist system for progressive characteristic and breakdown protectionspring preload via top capcomplex spring guidance system for noiseless springsblack anodised stanchion tubesall forks are supplied with a medium coilTechnology:Grip: Inspired by motocross technology, the Grip damper cartridge works with a spring-loaded, independently operating floating piston. Grip technology allows excess damping oil to flow through ports at the top of the damper, ensuring even damping and increasing durability. Models:matte black / 170 mm / 1.5" tapered / 15 x 110 mm / 44 mm: Suspension Travel: 170 mmSteerer Tube: 1 1/8" - 1.5" taperedFlow: 44 mmBrake Mount: Disc PM 7" (direct mount 180 mm)Axle Type: thru-axle with quick release lever (15 x 110 mm)Manufacturer Number: 912-01-100 gloss red / 180 mm / 1.5" tapered / 15 x 110 mm / 44 mm: Suspension Travel: 180 mmSteerer Tube: 1 1/8" - 1.5" taperedFlow: 44 mmBrake Mount: Disc PM 7" (direct mount 180 mm)Axle Type: thru-axle with quick release lever (15 x 110 mm)Manufacturer Number: 912-01-101 matte black / 180 mm / 1.5" tapered / 15 x 110 mm / 44 mm: Suspension Travel: 180 mmSteerer Tube: 1 1/8" - 1.5" taperedFlow: 44 mmBrake Mount: Disc PM 7" (direct mount 180 mm)Axle Type: thru-axle with quick release lever (15 x 110 mm)Manufacturer Number: 912-01-099Contents:1 x Marzocchi Bomber Z1 suspension fork1 x Marzocchi 15 x 110 mm thru-axle1 x star nut Manufacturer: FOX Factory GmbH Gewerbepark 6 66989 Höhfröschen Germany info@ridefox.com