Best 29er 140mm Rockshox and Fox Suspension Forks for Trail AM Bikes

140mm forks are a strong choice for modern trail bikes that need more control than a downcountry setup but still need to climb well. They give your front end more confidence on rough descents, steeper terrain, and faster trail riding without moving fully into heavy enduro territory.

RockShox and FOX both offer excellent 140mm options, from value-focused trail forks to premium Factory and Ultimate models. The comparison below breaks down five popular 140mm forks by price, performance, weight, stiffness, and best use.

RockShox Psylo 140mm suspension fork
RockShox Psylo (140mm)
Value-focused trail fork
Best Value Trail Check Amazon Browse Jenson USA Options
Price
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$350–$600Strong value for a modern 140mm trail fork
Performance
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Damper varies by modelGold models are more refined; Silver models are more budget-focused
Weight
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~2200–2800 gDepends heavily on Gold vs Silver version
Strength / Stiffness
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Stanchions: 35mmGood stiffness platform for trail riding
Best For
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Budget trail upgradesGreat when you want 140mm travel without Pike or FOX pricing
RockShox Pike Ultimate 140mm suspension fork
RockShox Pike Ultimate (140mm)
Premium lightweight trail fork
Premium RockShox Check Amazon Check Alternate Price
Price
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$800–$1,150Premium pricing, but top-tier Pike performance
Performance
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Damper: Charger Ultimate-level platformExcellent control, support, and small-bump sensitivity
Weight
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~1850–2000 gLight for a stiff 35mm 140mm trail fork
Strength / Stiffness
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Stanchions: 35mmPrecise steering and strong trail support
Best For
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Aggressive trail ridersBest pick when performance matters more than price
RockShox Pike Select 140mm suspension fork
RockShox Pike Select (140mm)
Performance trail fork
Best Value Pike Check Amazon Browse Jenson USA Options
Price
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$500–$800More affordable than Pike Ultimate
Performance
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Damper: Select-level Charger platformStrong control with fewer premium adjustments
Weight
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~1900–2050 gSlightly heavier than Ultimate but still trail-friendly
Strength / Stiffness
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Stanchions: 35mmSame confident Pike chassis feel
Best For
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Trail riders wanting Pike stiffness for lessExcellent middle-ground upgrade
FOX 36 SL Performance 140mm suspension fork
FOX 36 SL Performance (140mm)
Reliable all-around FOX trail fork
All-Round FOX Check Amazon Check Jenson USA
Price
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$600–$900Premium feel without Factory pricing
Performance
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Damper: GRIP, 3-positionSmooth, durable, and easy to tune
Weight
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Exact 140mm weight varies36mm SL chassis; weight depends on the exact model and configuration
Strength / Stiffness
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Stanchions: 36mmPredictable tracking and efficient trail feel
Best For
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Riders wanting dependable FOX performanceA strong balance of price, feel, and durability
FOX 36 SL Factory 140mm suspension fork
FOX 36 SL Factory (140mm)
2027 GRIP X • 29-inch trail fork
Premium FOX Check Price See Amazon Options
Price
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$1,200–$1,300Premium Factory pricing; linked 2027 GRIP X model
Performance
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Damper: GRIP X (2027)Excellent traction, support, and high-speed control
Weight
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Lightweight 36mm SL chassisCheck the selected 140mm SKU for its complete-fork weight
Strength / Stiffness
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Stanchions: 36mm36mm upper tubes with a lightweight trail-focused chassis
Best For
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Premium trail and lightweight all-mountain buildsBest FOX option when you want top performance

For the strongest 140mm trail performance, the RockShox Pike Ultimate and FOX 36 SL Factory are the premium choices. They are the best fit for riders who want a light but capable front end with high-end damping and confident control.

For better value, the RockShox Pike Select and FOX 36 SL Performance are excellent middle-ground options. The RockShox Psylo is the budget-friendly pick for riders who want modern 140mm travel and solid trail stiffness without spending premium fork money.

Before buying: Choose the 29-inch, 140mm option and match your frame’s approved fork travel, tapered steerer, 15×110mm front hub, offset and brake compatibility. Retailer pages may include other travel options. The FOX entries above are the 36 SL Performance GRIP and 2027 36 SL Factory GRIP X models linked here.

Prices shown are typical market ranges and may vary by seller and availability. Click “Check Price” to see current pricing through the affiliate links.

Shopping links: Amazon and Jenson USA buttons are affiliate links. As an Amazon Associate I earn from qualifying purchases. We may earn a commission at no additional cost to you. Existing Amazon product links are retained; “See Amazon Options” and “Browse Jenson USA Options” open searches, which may include alternatives or no exact match. Check the exact model, generation, 29-inch wheel size, 140mm travel, axle and stock before ordering. A retailer button does not confirm availability. Retailer links use AvantLink tracking.