--- description: All-mountain carbon 29er frame built for technical trails, aggressive descents, and efficient climbing. Responsive suspension and modern geometry for balanced speed and control. title: FS831 VPP 29er AM Trail Suspension Frame MTB image: https://haidelibikes.com/wp-content/uploads/2025/05/FS831-MTB-suspension-frame-29er-12.jpg --- [Skip to content](#content) ![carbon mtb bike frame size chart](https://haidelibikes.com/wp-content/uploads/2025/05/FS831-MTB-suspension-frame-29er-15.webp) ## Carbon Fiber Full Suspension Mountain Bike Frame * VPP structure delivers superior traction and control on technical trails. * High pedaling efficiency ensures powerful climbs and smooth rides. * Perfect grounding performance enhances stability over rugged trails. * With 160mm front and 150mm rear travel. ![full suspension mtb frame 29ER](https://haidelibikes.com/wp-content/uploads/2025/05/FS831-MTB-suspension-frame-29er-1.webp) ![carbon bike frame mtb suspension](https://haidelibikes.com/wp-content/uploads/2025/05/FS831-MTB-suspension-frame-29er-3.webp) ![](https://haidelibikes.com/wp-content/uploads/2025/05/FS831-MTB-suspension-frame-29er-2.webp) Model NO.: FS831 Type: AM mtb suspension frame 29er Material: T1000+T800 carbon fiber Frame Size: 29er\*S/M/L/XL (16/17.5/19/21) Headset: 1 1/8 to 1 1/2, Tapered Headset top&down diameter: 42-52mm Seat Tube: 31.6mm Max tires: 29er \*2.4” Brake type: 180mm Disc brake (max 200mm) Bottom bracket: BB92 Rear axle: 148\*12mm Weight: at least 2250g+/-50g (S) Frame travel: front 160mm, rear 150mm Crank set: Max Shimano 34T and SRAM 34T Suitable speed: 10s, 11s and 12s Rear shock CC: 210\*55mm Leverage ratio for the rear shock absorber: 2.73: 1 Width of shock ends: front 8\*22mm, rear 8\*30mm Package includes: frame\*1+headset\*1+clamp\*1+rear thru axle shaft\*1+chain protector\*1 Size Guide for FS831: S=16” (165-175), M=17.5”(175-185), L=19”(183-193), XL=21”(193-201) ## Headset 1 1/8” to 1 1/2”, Tapered top&down 42-52mm * It features 1-1/8″ to 1-1/2″ tapered head tube (42-52mm), boosting front-end stiffness and precise handling over rough trails. Perfect for modern full suspension MTB and enduro bike builds. ![](https://haidelibikes.com/wp-content/uploads/2025/05/FS831-MTB-suspension-frame-29er-13.webp) ![](https://haidelibikes.com/wp-content/uploads/2025/05/FS831-MTB-suspension-frame-29er-5.webp) ## 31.6mm Seat Post Size * It uses a 31.6mm seat tube, allowing compatibility with a wide range of dropper posts and boosting strength for aggressive riding. Perfect for full suspension MTB and trail bike setups. ## High Leverage Ratio 2.73 * With high 2.73 leverage ratio, it delivers smoother suspension response and better small-bump sensitivity. Ideal for full suspension mountain bike and enduro MTB performance. ![](https://haidelibikes.com/wp-content/uploads/2025/05/FS831-MTB-suspension-frame-29er-14.webp) ![](https://haidelibikes.com/wp-content/uploads/2025/05/FS831-MTB-suspension-frame-29er-4.webp) ## BB92 Bottom Bracket * BB92 enhances pedaling stiffness and supports a wider range of cranksets than other standards—perfect for any full suspension MTB frame or mountain bike frame. ## 148×12mm Boost Thru Axle * 148mm thru axle for boosted rear-end stiffness and sharper trail handling. ## 180mm Disc Brake (max 200mm) * 180mm disc brake mount (max 200mm) offers powerful, consistent stopping for any full suspension MTB frame, enduro bike, or aggressive trail mountain bike build. ![](https://haidelibikes.com/wp-content/uploads/2025/05/FS831-MTB-suspension-frame-29er-6.webp) ![haidelibikes factory](https://haidelibikes.com/wp-content/uploads/2025/04/工厂测试图-1024x572.webp) ## Haidelibikes Factory * Lead Time: Efficient production and on-time deliver. * Custom Painting: Yes, fully customizable designs. * OEM & ODM: Welcome-your brand, our support. * MOQ: Starting from just 5 sets. * Sample Policy: Samples available on request. ## Advanced Production Facilities * ISO-certified testing lab ensuring compliance with global standards. * Exclusive Infrared Detection System – Our proprietary technology for internal defect inspection, ensuring every frame meets the highest safety and durability standards. ![](https://haidelibikes.com/wp-content/uploads/2025/04/检测设备生产-1024x572.webp) ![](https://haidelibikes.com/wp-content/uploads/2025/04/生产工艺-1024x576.webp) ## ****Manufacturing Techniques** * Blow molding: for lightweight frames and high-strength frame structures. * EPS/latex molding: ensures precision interiors shaping. ## ****Full-Service Capabilities** **–** **One-Stop Solution** * Design → Prototyping → Mass production → Custom Painting * Masterful Painting Craftsmanship–Our expert painters, with 10+ years of experience, deliver flawless custom finishes, ensuring both durability and aesthetic excellence. ![](https://haidelibikes.com/wp-content/uploads/2025/04/烤漆工艺-1024x548.webp) ```json {"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/haidelibikes.com\/mtb-bike-frame\/trail-bike-mtb-suspension-frame-carbon\/fs831-vpp-29er-am-suspension-frame-mtb\/","url":"https:\/\/haidelibikes.com\/mtb-bike-frame\/trail-bike-mtb-suspension-frame-carbon\/fs831-vpp-29er-am-suspension-frame-mtb\/","name":"FS831 VPP 29er AM Trail Suspension Frame MTB - Haidelibikes","isPartOf":{"@id":"https:\/\/haidelibikes.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/haidelibikes.com\/mtb-bike-frame\/trail-bike-mtb-suspension-frame-carbon\/fs831-vpp-29er-am-suspension-frame-mtb\/#primaryimage"},"image":{"@id":"https:\/\/haidelibikes.com\/mtb-bike-frame\/trail-bike-mtb-suspension-frame-carbon\/fs831-vpp-29er-am-suspension-frame-mtb\/#primaryimage"},"thumbnailUrl":"https:\/\/haidelibikes.com\/wp-content\/uploads\/2025\/05\/FS831-MTB-suspension-frame-29er-12.webp","datePublished":"2025-04-28T08:54:02+00:00","dateModified":"2025-05-28T09:52:52+00:00","description":"All-mountain carbon 29er frame built for technical trails, aggressive descents, and efficient climbing. 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