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/ProX Carbon Gravel Rims Widened 32mm Inner Width 700C Gravel Bike Carbon Rims

wide gravel carbon rims
wide gravel carbon rims wide gravel carbon rims wide gravel carbon rims wide gravel carbon rims wide gravel carbon rims wide gravel carbon rims wide gravel carbon rims wide gravel carbon rims

ProX Carbon Gravel Rims Widened 32mm Inner Width 700C Gravel Bike Carbon Rims

• Super wide 32mm inner width, for 44C-70C tires

• 40/45/50mm height optional

• Reinforced lay-up structure

• Designed for CX/gravel bikes

• Tubeless ready

• High quality, 2 years warranty

  • Item NO.:

    PXG32 Gravel

  • Payment:

    Paypal, Bank Transfer

  • Origin:

    China

  • Color:

    UD/3K/12K(Customized Decal Acceptable)
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DESCRIPTION

Cyclocross and gravel carbon rims demand versatility and durability. ProX super wide gravel carbon rims are designed with 32mm inner width, which is suitable for gravel tires with size 700*44C-70C. The 40/45/50mm rim height options strikes a compelling balance for mixed-terrain adventures. 

The U-shaped rim profile enhances tire compatibility and stability. With a 32mm inner width, this design ensures optimal support for high-volume gravel tires (44C-70C), reducing the risk of tire rollover during aggressive cornering or technical descents. The wider bed allows tires to maintain a natural rounded profile, improving grip and shock absorption on loose surfaces like gravel, dirt, or mud. Built to handle the latest high-volume gravel tires, ensuring compatibility with evolving market trends.

super wide 32mm inner width gravel carbon rims

Rim Height Options: 40mm vs. 45mm vs. 50mm

Choosing the right rim height depends on riding style and terrain:
40mm: Ideal for technical, unpredictable terrain. The lower profile prioritizes agility, weight savings, and crosswind stability. Perfect for riders tackling steep climbs or twisty singletrack.
45mm: A versatile middle ground. Balances aerodynamic gains compared to 40mm rim, and with moderate weight. It suits riders mixing paved gravel terrain.
50mm: Maximizes aerodynamic efficiency for fast-paced gravel races or rolling terrain. Slightly heavier on weight but offers noticeable speed retention on smoother surfaces.

ProX decal/logo is offered for free as showed in ProX decal page if decal in stock. The decal will be applied on the rim and do the matte or glossy finish according to customers’ preference. You can choose either with ProX decal or simply without decal (UD black matte or UD black glossy finish).

Upgrade your gravel bike today—ride farther, faster, and with total confidence!

carbon gravel wheels

SPECIFICATION

700C Super Wide 32mm Inner Width Disc Brake CX/Gravel Bike Carbon Rims (Tubeless Ready)

Model PXG32-40C PXG32-45C PXG32-50C
Size 700C 700C 700C
Terrain(Recommended) Cyclocross/Gravel Cyclocross/Gravel Cyclocross/Gravel
Material T700 T700 T700
Weight(±15g) 430g 440g 460g
Max Weight Limit 120kg/265lb 120kg/265lb 120kg/265lb
Depth 40mm 45mm 50mm
Sectional Drawing 32mm inner width Gravel carbon rim 40mm depth 32mm inner width Gravel carbon rim 45mm depth 32mm inner width Gravel carbon rim 50mm depth
Outer Width 37.5mm 37.5mm 37.5mm
Inner Width 32mm 32mm 32mm
Spoke Holes 24H/28H/32H 24H/28H/32H 24H/28H/32H
ERD* 560mm 550mm 540mm
Rim Bead Hook Hook Hook
Tire Type Tubeless or Clincher Tubeless or Clincher Tubeless or Clincher
Brake Type Disc Brake Disc Brake Disc Brake
Max Spoke Tension 130kgf  130kgf  130kgf 
Max Tire Pressure 90psi/6.2bar 90psi/6.2bar 90psi/6.2bar
Tire Size(Recommended) 700*44C-70C 700*44C-70C 700*44C-70C


calculate the ERD of gravel rims

ERD*

Effective Rim Diameter (ERD) is the maximum distance that spokes need to bridge going from one end of the rim to another. How do we calculate the ERD of our rims? The corresponding equation and a drawing is as shown:

ERD=OD-(rim depth)*2+(rim thickness)*2

For example：

ERD of PXG32-40C rim=633mm-40mm*2+3.5mm*2=560mm

Most people prefer ERD including the length of the nipple cap. However, customers may use different nipples and components for building. Please add the height of the nipple cap(2.5mm~3mm generally) for your spoke calculation. If the height of the nipple cap is 3mm, then ERD of your PXG32-40C rim is 560mm+3mm*2=567mm


A: Rim nipple bed thickness (=3.5mm)

B: Length of nipple cap (2.5mm~3mm generally)

TECHNOLOGY
Carbon Fiber Material

Carbon Fiber Material

Premium Toray T700 carbon fiber are used in our carbon rims. 

Combining with stable resin system to make consistent quality and strong carbon gravel rims.

Wider Inner Width

Wider Inner Width

Wider 32mm inner width, optimized for wide 700x44C-70C gravel bike tires.

Wider stance for tire, easy tire mounting and dismounting.

Better traction and cornering performance.

Aero U Shape

Aero U Shape

Wide U Shape carbon road rims are more aerodynamic than traditional V Shape road bike carbon rims. 

Besides, the stiffness and strength are also much better. 

Bead Lock

Bead Lock

There are small ridges on both side of rim channel called “bead lock”, which makes it easy for tubeless tire inflation.

Together with hooked bead to well lock the tire, prevent it from blowing out.

Tubeless Ready

Tubeless Ready

Tubeless tire is widely used in carbon gravel wheelset thanks to its better traction, lower rolling resistance and better riding comfort.

All our gravel carbon rims are tubeless ready (also fit normal tube tires), no matter bead hook or hookless model.

Optimized anti-burp bump design provides easy tire mounting, dismounting, as well as air inflation. 

Disc Brake

Disc Brake

Disc brake provides more sensitive and precise braking performance than rim brake.

All our carbon gravel rims are designed for disc brake use, no brake track. No “burning rim” worries during braking.

Specific carbon prepreg lay-up design for disc brake rims, longer durability and lighter weight.

2-Year Warranty

2-Year Warranty

We have strict production management system, QC and Testing process. Our quality is always very good and reliable.

For all carbon rims and carbon wheels sold by ProX, 2 years’ quality warranty is offered (starting from the date of package being signed).

Click Warranty Policy to see more details in another page.

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Contact Us
Xiamen ProX Carbon Technology Co., Ltd. set up factory in Xiamen City (Fujian Province, China) in 2010. At the beginning, we manufactured all kinds of customized carbon fiber products according to customers’ demand, including carbon bike rims, carbon tubes, carbon drone body shell, etc. Since 2012, we decided to focus on main products - carbon bike rims. In 2012, we built full range carbon road rims with 20.5mm width. In 2014, we built full range carbon road rims with 23mm width. In 2015, we built full range carbon road rims with 25mm width. In 2016, we introduced product line for BMX carbon rims, as well as fatbike carbon rims. In 2018, we introduced product line for MTB carbon rims (both symmetric and asymmetric design). During the same year, we set up wheel building workshop, and started to build carbon wheelset in-house. In 2019, we added 28mm width carbon road rims into our product line (both rim brake and disc brake). Besides, we created gravel carbon rims. During the same year (2019), LightCarbon (China leading carbon frame manufacturer) visited us. After several trial order for testing, they were very satisfied with our quality. Eventually, LightCarbon invested our facotry, and we build close business relationship. ProX supply carbon rims and carbon wheelset to LightCarbon, and LightCarbon supply carbon frameset and components to ProX. Since then, both ProX and LightCarbon are able to supply carbon rims, carbon wheels and carbon frameset, with same factory price. So it is convenient for customers to do one-stop purchasing. We are known and recognized by more and more brands, and have been selling our carbon rims/wheels/framesets to over 60 countries till 2023. ProX is always ready to supply you high quality carbon rims/wheels/frames, with fast delivery! Why Choose ProX? * More than 10 years’ experience in carbon rims developing and manufacturing. * More than 3,000M² plant area. * 50+ total staff, including 6 engineers, 40+ well-trained workers. * Already got 40+ utility and invention patent. * 4,000 pcs/month production capacity for carbon rims. * 1200 pairs/month production capacity for carbon wheelsets. * Our carbon rims are rigorously tested under international standard ISO4210. * Well selected hubs and spokes used to build wheelset, including DT Swiss, Powerway hubs, etc. Sapim, Pillar spokes, etc. * All wheelsets are hand built and trued by experienced mechanician. * Customized logo, painting or package is available. * We can also help to make new graphic design. * Private mould for rims and even hubs are also negotiable. * Good production management to ensure in-time delivery. * Fast response and good after-sale support.....     LEARN MORE >>  
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