Reserve 48/53GR 2026: Carbon wheels with aerodynamic profiles for gravel riding

A pair of tubeless-ready carbon wheels dedicated to gravel riding

The DT 350 Reserve 48|53 GR carbon gravel wheels are designed for gravel racing and fast rides on mixed surfaces. They combine a 48mm front rim with a 53mm rear rim, Turbulent Aero technology, and a wide Hollow Hook construction to deliver aerodynamics, control, and pinch protection.

The difference in height between the two rims serves a specific purpose. The 48 mm front profile limits unpredictable reactions when crosswinds increase, while the 53 mm rear rim enhances aerodynamics without directly affecting steering precision. The 44 mm external width optimizes airflow around the tire and rim.

This DT 350 version has a claimed weight of 1528g per pair. It uses DT Swiss 350 hubs, a Center Lock disc mount, 12x100mm and 12x142mm axles, and a choice of XDR or HG-EV freehub body. The rims have an internal width of 30mm and are recommended for gravel tires from 40 to 57mm.

Differentiated design 48|53 GR

48 mm front rim

The front wheel uses a 48mm deep rim. This shallower profile is designed to limit unpredictable reactions in strong crosswinds and maintain more consistent handling.

53 mm rear rim

The rear wheel features a 53mm rim. This taller profile improves the aerodynamic performance of the rear wheel without directly affecting steering precision.

Configuration developed for gravel racing

The combination of the two profiles is designed to maintain a constant speed on fast gravel routes, while retaining predictable and smooth behavior throughout the ride.

Turbulent Aero Technology

Aerodynamic development for real-world conditions

The Reserve 48|53 GR incorporates Turbulent Aero technology, used to study airflow around wheels under varying conditions.

External width of 44 mm

The extra-wide 44 mm profile allows air to flow more smoothly around the tire and rim. This continuous airflow aims to reduce aerodynamic drag.

Tire and rim association

The external width is designed to work with modern gravel tires. The aim is to create a more gradual transition between the tire and the rim to promote smooth airflow.

Hollow Hook Construction

Semi-hook rim

The 48|53 GR uses a semi-crocheted Hollow Hook construction. This design is intended to combine a large internal and external width with a controlled amount of material.

Reduction of excess material

The Hollow Hook structure removes excess material from inside the hook area. This allows Reserve to produce a wide rim without unnecessarily increasing its weight.

Pinch protection

The hook width reaches 4.5 mm. This enlarged area increases the contact surface with the tire and helps protect it against pinching during impacts.

Lifetime warranty

The Hollow Hook construction and carbon rims are covered by the lifetime warranty advertised by Reserve.

Internal width of 30 mm

Optimized for modern gravel tires

The 30mm internal width is designed for tire sections commonly used in gravel riding. Reserve recommends tires from 40 to 57mm.

Tire shape on the rim

This width allows the tire to take on a wider shape once mounted. It aims to increase its contact area with the ground.

Limitation of the lightbulb effect

The rim is designed to limit the blistering effect, which occurs when the tire sidewalls tighten at the rim before reaching their maximum width.

Adhesion and stability

The shape obtained with an internal width of 30 mm can offer a larger contact surface, with more grip and stability on gravel surfaces.

Carbon rims

Differentiated heights

• Front rim 48 GR: 48 mm
• Rear rim 53 GR: 53 mm

Rim weight

• Front rim 48 GR: 445 g
• Rear rim 53 GR: 465 g

Widths

• Internal width: 30 mm
• External width: 44 mm
• Hook width: 4.5 mm

ERD

• ERD of the 48 GR rim: 545 mm
• ERD of the 53 GR rim: 535 mm

DT Swiss 350 Hubs

Version equipped with DT 350 hubs

This version of the Reserve 48|53 GR uses DT Swiss 350 hubs.

Cross axes

• Front hub: 12x100 mm
• Rear hub: 12x142 mm

Fixation Center Lock

The hubs use a Center Lock mounting for the brake discs.

Freewheel body of your choice

The DT 350 version is supplied with a freehub body selected at the time of ordering.

• Sram XDR
• Shimano HG-EV

Shelving

24 spokes per wheel

The front wheel and the rear wheel each use 24 spokes.

Asymmetrical rear offset

The rear rim has an asymmetrical offset of 2.8 mm.

Tires and tubeless compatibility

Recommended sections of 40 to 57 mm

Reserve recommends the use of gravel tires with a width between 40 and 57 mm.

Rim tape installed

The wheelset comes with a 32mm Reserve rim tape already installed.

Fillmore tubeless valves

Two Reserve Fillmore tubeless valves are supplied separately to match the two rim heights.

• 1 x 70mm Fillmore valve
• 1 x 90mm Fillmore valve

Braking and standards

Use with disc brakes

The Reserve 48|53 GR are designed for gravel bikes equipped with disc brakes.

Fixation Center Lock

The front and rear hubs use the Center Lock standard for disc mounting.

Hub spacing

• Front: 12x100 mm
• Rear: 12x142 mm

Safety and maximum pressure

ASTM Classification Condition 2

The wheels are classified ASTM Condition 2.

Maximum pressure of 5.5 bar

The maximum permissible pressure for the wheels is 80 psi, or 5.5 bar.

Respecting the tire limit

When the maximum pressure indicated by the tire manufacturer is less than 80 psi or 5.5 bar, this lower value must be respected.

Lifetime Warranty Reserve

No weight limit for the cyclist has been announced.

Reserve indicates that the wheels are not subject to any rider weight limit.

Lifetime warranty

The wheels are covered by the Reserve lifetime warranty, in accordance with the conditions defined by the brand.

Customer service support

Reserve offers support via email, chat, or scheduled video call to assist users with any issues they may have with a Fillmore wheel or valve.

Box contents

• 1 front wheel Reserve 48 GR
• 1 rear wheel Reserve 53 GR
• 1 XDR or HG-EV freehub body of your choice
• 32mm Reserve rim tape installed
• 1 Fillmore 70mm tubeless valve (not installed)
• 1 Fillmore 90mm tubeless valve (not installed)
• Reserve white rim stickers not installed
• User manual

Technical specifications

General Information

• Product: Pair of Reserve 48|53 GR DT 350 wheels
• Use: gravel racing
• Weight of the pair: 1528 g
• Cyclist weight limit: no limit announced
• ASTM Classification: Condition 2
• Maximum pressure: 80 psi / 5.5 bar
• Warranty: Lifetime subject to conditions. Reserve

Front rim 48 GR

• Material: carbon
• Construction: Semi-crocheted Hollow Hook
• Height: 48 mm
• Weight: 445 g
• ERD: 545 mm
• Internal width: 30 mm
• External width: 44 mm
• Hook width: 4.5 mm
• Number of spokes: 24

53 GR rear rim

• Material: carbon
• Construction: Semi-crocheted Hollow Hook
• Height: 53 mm
• Weight: 465 g
• ERD: 535 mm
• Internal width: 30 mm
• External width: 44 mm
• Hook width: 4.5 mm
• Number of spokes: 24
• Asymmetrical offset: 2.8 mm

Hubs and braking

• Hubs: DT Swiss 350
• Front axle: 12x100 mm
• Rear axle: 12x142 mm
• Disc mounting: Center Lock
• Available freehub bodies: XDR or HG-EV
• Body included: an option to choose

Tires and tubeless

• Recommended tire dimensions: 40 to 57 mm
• Rim tape: Reserve 32 mm installed
• Front valve: Fillmore 70 mm not installed
• Rear valve: Fillmore 90 mm not installed

Recommended use

• Gravel competition
• fast gravel routes
• Long races on mixed surfaces
• Performance Gravel
• Bicycles equipped with 12x100 mm and 12x142 mm axles
• Bicycles equipped with Center Lock disc brakes
• Mounts with tires from 40 to 57 mm
• Sram XDR or Shimano HG-EV transmissions

Why choose Reserve 48|53 GR DT 350?

• Pair of carbon wheels developed for gravel racing
• Turbulent Aerodynamic Technology
• 48mm front rim to limit reactions to crosswinds
• 53mm rear rim to enhance aerodynamic performance
• External width of 44 mm
• 30mm internal width optimized for modern gravel tires
• Recommended compatibility with tires from 40 to 57 mm
• Semi-crocheted hollow hook construction
• 4.5 mm hook designed to protect against pinching
• Advertised weight of 1528 g per pair
• DT Swiss 350 Hubs
• 24 spokes at the front and rear
• 2.8 mm rear asymmetric offset
• 12x100mm and 12x142mm thru axles
• Center Lock disc mount
• Choice of XDR or HG-EV freehub body
• Reserve rim tape installed
• 70mm and 90mm Fillmore tubeless valves included
• No weight limit for the cyclist has been announced.
• Lifetime Warranty Reserve