SR Suntour Raidon 32 Boost 27.5+ Suspension Fork - 120mm Air, Tapered, 15x110mm

Air Spring | 100/120mm Adjustable Travel | Crown Speed Lockout | Magnesium Lowers | Gloss Black

A quality air suspension fork from SR Suntour's well-regarded Raidon range. The Raidon 32 Boost sits in SR Suntour's XC/Trail line and is a significant step up from entry-level coil forks - offering a tunable air spring, crown-mounted hydraulic speed lockout, adjustable rebound, and lightweight magnesium lower legs. The 27.5"+ Boost variant is specifically built for wider Plus-size tyres (up to approximately 2.8") on Boost-spaced hubs (15x110mm), and the tapered CTS steerer provides improved stiffness over a straight 1-1/8" design. A popular upgrade choice for riders moving from a coil fork on a hardtail MTB.

Key Features

• Air spring: Tunable via Schrader valve - set air pressure to suit your weight and riding style for a personalised feel. Much more adjustable than a coil spring
• 100/120mm adjustable travel: Factory set to 120mm. Can be adjusted to 100mm internally if required
• Crown-mounted Speed Lockout (LO-R): Hydraulic lockout lever at the crown allows the fork to be locked out for climbing or road sections, with rebound adjust on the same leg
• Magnesium lower legs: Magnesium monocoque lowers save significant weight compared to alloy lowers while maintaining rigidity
• 32mm 6061 alloy stanchions: A proven diameter for XC/trail use - stiff enough for confident handling without excess weight
• Boost 15x110mm axle spacing: Wider hub spacing for increased wheel stiffness and improved tyre clearance - the current standard on modern trail and enduro MTB frames
• Tapered CTS steerer: 1.5" lower / 1-1/8" upper alloy tapered steerer - stiffer and more precise than a straight steerer design
• 27.5"+ wheel compatibility: Designed for Plus-size tyres up to approximately 2.8" width
• Post mount disc brake: 160mm post mount as standard; 180mm with an adaptor

Specifications

• Brand: SR Suntour
• Model: Raidon 32 Boost LO-R
• Wheel size: 27.5"+ (Plus)
• Travel: 100/120mm adjustable (factory set 120mm)
• Axle: 15x110mm Boost (Q-LOC 2) - axle NOT included
• Steerer: Tapered CTS - 1.5" lower / 1-1/8" upper, alloy
• Steerer length: 195mm
• Stanchions: 32mm, 6061 aluminium, gloss black
• Lowers: Magnesium monocoque
• Crown: Forged alloy
• Damper: LO-R - crown Speed Lockout with rebound damping adjust
• Spring: Air (Schrader valve)
• Brake mount: Post mount 160mm (180mm with adaptor)
• Offset: 42mm
• Colour: Gloss Black
• Weight: Approximately 1980-2020g (without axle)

Compatibility

✓ COMPATIBLE WITH:

• Frames with a tapered headtube (1.5" lower / 1-1/8" upper) - the current standard on most MTB hardtails and full-suspension bikes
• Boost hub spacing (110mm front) - required for this fork
• 27.5"+ (Plus) wheels and tyres up to approximately 2.8" width
• Post mount disc brake calipers, 160mm rotor standard (180mm with adaptor)

✗ NOT COMPATIBLE WITH:

• Straight/non-tapered headtubes - this fork requires a tapered headset and tapered headtube
• Non-Boost hubs (100mm QR or 15x100mm) - the 110mm Boost dropout spacing is specific to this fork
• Standard 27.5" (non-Plus) tyres wider than approximately 2.8" - check tyre clearance for your intended setup

Note on steerer length: The steerer measures 195mm. This suits most frame setups - check your headtube length plus spacer and stem stack requirements before purchasing. The steerer can be cut shorter but cannot be extended, so measure carefully.

Note on axle: The 15x110mm Boost thru-axle is NOT included. A compatible Q-LOC 2 or standard 15x110mm Boost thru-axle is required for installation and is available separately from most bike shops.

Note on crown race: No separate crown race is required - the Raidon 32 Boost uses a tapered headset design where the lower bearing seats directly on the machined crown surface of the fork. The fork is complete as supplied.

Condition

New - Without Packaging. This fork has not been ridden or fitted to a bike. It has been stored without its original packaging and shows minor cosmetic marks from handling and storage - one very small paint chip near the SR Suntour logo, and a few light surface scuffs on the lowers. None of these affect function in any way. The stanchions, seals, air spring, and lockout mechanism are all in new condition. Sold without the thru-axle.