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SDI Shock – Rear Defender HD10 (64") | 28mm Performance Rebuildable Pair Upgrade your UTV ride with the SDI Shock from SDI—engineered for confident control, consistent damping, and long-lasting durability. Built specifically for the rear on Defender HD10 applications with 64" fitment, this pair delivers a smoother, more responsive feel over demanding terrain. Key Features PTFE lined 28 mm spherical bearings with sealed spacers for low-friction, precise movement Race-style quick adjust preload ring accepts any 6 mm tool and locks with a pinch bolt High tensile lightweight barrel-formed springs for bow resistance with automotive grade paint T6 billet aluminum shock body with hard anodized finish to resist warping, fade, and wear Trapezoidal threads nearly impervious to thread damage from preload rings Hard anodized body cap, reservoir, and eyelet No plastic inside for reduced wear and improved reliability Ultra low-friction synthetic shock oil with low foaming to resist fade and heat breakdown Double disc washers for tight damping tolerance and optimal perpendicularity Induction hardened shafts with hard chrome coating for maximum pitting and wear resistance High flow piston + Large Bore LSC for low opening forces and optimized frequency response/adjustment range Industry-leading NOK HNBR seal and Daido shaft bushing 3-piece fully rebuildable seal head for quick, easy maintenance Specifications Brand: SDI Product Name: Shock Mounting Position: Rear Riding Style: UTV Material: T6 Billet Aluminum Color/Finish: Hard Anodized Units: Pair Weight: 27.2 lbs Dimensions: 28.5" x 17" x 5.5"
PTFE lined 28 mm spherical bearings with sealed spacers
Race style quick adjust preload ring accepts any 6 mm tool and locks with pinch bolt
Super high tensile lightweight springs are barrel formed for bow resistance and feature automotive grade paint
T6 billet aluminum shock body with hard anodized finish resists war or fade
Trapezoidal threads are nearly impervious to thread damage from preload rings
Hard anodizing body cap, reservoir and eyelet
Wear resistant and fade free
All internal parts are machined from high strength aluminum and anodized to reduce oil reactivity
No plastic inside the shock
Ultra low friction synthetic shock oil has low foaming properties to resist fade and heat break down
Double disc round compression and rebound washers ensure optimal perpendicularity and tight damping tolerance from shock to shock
Induction hardened shafts with hard chrome coating provide the highest resistance to pitting and wear
High flow piston creates low opening forces and ultra sensitive frequency response
Large Bore LSC allows for optimized frequency response and adjustment range
Industry leading NOK HNBR seal and Daido shaft bushing
3-Piece fully rebuildable seal head allows quick and easy maintenance