Detailed Specifications:
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Brand: Fox
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Model: IsoStrut Rear Shock – Performance Series
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Part Number: 972-61-237
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Serial Example: 812050-0186-T (may vary)
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Model Year: 2020 Series
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Bike Compatibility: Trek Supercaliber & E-Caliber Gen 1 only (Size M–XL frames)
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Travel: 32.5mm
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Damper Length: 135mm
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Strut Length: 235mm
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Outer Diameter: 36mm
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Rotation / Eyelet Angle: 30° (specific to M–XL Supercaliber frames)
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Spacer: 0.1mm
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Steerer Type: Remote PTL (Push-to-Lock)
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Adjustment Type: Remote-operated compression with rebound adjust
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Color: Black / Performance Series Finish
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Intended Use: Cross-country (XC) / Marathon
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E-Bike Compatibility: Yes (E-Caliber only)
Performance Series Details:
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Performance-level damping system provides smooth, controlled suspension ideal for race and endurance XC setups.
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Black anodized finish with laser-etched graphics for durability and clean aesthetics.
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Features lightweight aluminum construction with advanced Fox seals for minimal friction and long-term reliability.
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Compatible with Fox remote lockout levers (sold separately).
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Factory-tuned by Trek and Fox for Supercaliber’s IsoStrut system, delivering a blend of rear compliance and efficiency unique to this platform.
Important Usage Notes:
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Designed exclusively for Trek Supercaliber & E-Caliber Gen 1 frames (sizes M–XL).
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Not compatible with Gen 2 Supercaliber frames.
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Installation and service should be performed by a qualified Trek or Fox technician due to the proprietary design.
Riding Impressions:
The Fox IsoStrut Performance Series shock offers efficient and controlled performance for the Supercaliber’s unique integrated suspension system. With its 30° eyelet rotation and precise damping, it maintains exceptional traction and power transfer while keeping weight low—ideal for XC racers and high-performance riders.
Disclosure:
This listing is for a genuine Fox Performance Series IsoStrut rear shock (235x32.5mm), designed for Trek Supercaliber & E-Caliber Gen 1 (M–XL).
Example serial number provided; actual unit may vary.
Retail packaged with full Fox manufacturer warranty when installed by an authorized Trek or Fox service center.
