ZIPP 303 XPLR S Carbon B1 Rear Wheel

The Zipp 303 XPLR S Carbon B1 Rear Wheel is a fast, strong gravel wheel for riders who want carbon performance at a lower price point. Its 32mm internal rim width is built for approved 40c to 60c tubeless-ready tyres, giving the tyre more air volume for lower pressure, better grip and less vibration. A 54mm deep rim profile helps improve aero efficiency on fast gravel and mixed-surface rides.

Key Features and Benefits:

• 32mm internal rim width: The ultra-wide rim supports approved 40c to 60c tyres with a larger contact patch and more air volume, which helps improve grip, control and rolling speed on rough gravel.
• Hookless Tubeless Straight Side rim: The TSS rim works with approved tubeless-ready tyres and sealant or tubes, helping create a secure tyre fit with simple pressure control for gravel use.
• 54mm deep carbon rim profile: The wide and deep rim shape is made to work with larger gravel tyres, reducing drag so the wheel can hold speed better on fast mixed-surface routes.
• Zipp Total System Efficiency design: The wheel is shaped around real riding losses, including vibration, tyre drag, weight and aero drag, so it can feel faster across rough and smooth ground.
• Lower pressure support: The wide rim lets riders run lower tyre pressures within the approved range, which helps reduce trail buzz and keeps the tyre settled over loose or broken surfaces.
• 24-hole 2-cross spoke build: The 24-spoke layout adds strength and balanced support at the rear wheel, helping manage drive forces and braking loads on rough terrain.
• CX Sprint spokes with brass nipples: The bladed spokes support speed and stiffness, while brass nipples add durability for a wheel that is built to handle regular gravel use.
• Rear hub and drivetrain options: The wheel is available with SRAM XDR 12/13 speed or SRAM/Shimano Road 10/11 speed freehub options, giving clear drivetrain fitment for modern gravel builds.

This rear wheel is built for riders who want more speed, comfort and control from one upgrade. The wide carbon rim gives gravel tyres the shape and volume they need to work well at lower pressure. The result is better grip on loose ground, less harsh feedback through the bike and stronger pace on fast sections.

Choose the Zipp 303 XPLR S Carbon B1 Rear Wheel for a gravel-ready carbon upgrade with wide tyre support, aero shaping and proven Zipp design at a more accessible price.

Features:

• Fast and robust gravel rear wheel
• Freehub Type: SRAM XDR 12/13 Speed or SRAM/Shimano Road 10/11 speed
• Hookless Tubeless Straight Side rim construction
• Ultra-wide 32mm internal rim width
• Designed for approved 40c–60c TLR tyres
• Wide and deep rim profile for aerodynamic efficiency
• Supports lower tyre pressures for improved grip and reduced vibration
• Applies Zipp Total System Efficiency to gravel riding
• 24-hole 2-cross build
• CX Sprint spokes
• Disc brake compatible with Centre Lock fitment
• Ships with 12mm rear end caps
• Lifetime Warranty

Specifications:

• Wheel Size: 700c
• Rim Construction: Hookless/Tubeless Straight Side (TSS)
• Tyre Compatibility: Approved TLR tyres 40c–60c with tube or sealant
• Rim Depth: 54mm
• Internal Rim Width: 32mm
• Max Outside Width: 40mm
• Brake Compatibility: Disc, Centre Lock
• Rim Profile: Symmetrical
• Nipple Material: Brass
• Spoke Type: CX Sprint
• Spoke Count: 24
• Spoke Pattern: 2 Cross
• Freehub Type: SRAM XDR 12/13 Speed or SRAM/Shimano Road 10/11 speed
• Axle Type: TA 12x142
• Bearings: Cartridge, Carbon Steel
• Max Tyre Pressure: 50psi / 3.45bar
• Max Recommended System Weight: 135kg