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/ProX 29mm Wide Disc Brake Carbon Clincher Rims 23mm Inner Width 700C Road Carbon Rim Tubeless Ready

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ProX 29mm Wide Disc Brake Carbon Clincher Rims 23mm Inner Width 700C Road Carbon Rim Tubeless Ready

• Widened 23mm Inner Width, for 30C-50C tires

• Depth option: 38/45/50/55/60mm

• Tubeless ready

• Wide U shape design, more aero and stiff

• High quality, 2-year warranty

  • Brand:

    PROX

  • Item NO.:

    PRD923-C

  • Payment:

    Paypal, Bank Transfer

  • Origin:

    China

  • Color:

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

Widened 23mm internal width carbon fiber road rim is introduced. designed for cycling riders who refuse to settle. Aerodynamically optimized and available in five versatile heights (38/45/50/55/60mm), this rim series redefines what’s possible on the road.
Designed for modern road bike riding, the wider rim profile supports larger tires (30-50mm size) effortlessly, enhancing grip, comfort, and stability. Say goodbye to pinch flats and hello to smoother cornering and confident descents.

carbon road bicycle rims for 30~50c tires

Aero Efficiency Meets Versatility: Choose your weapon
38mm: The ultimate climber’s choice—featherlight, responsive, and perfect for climbing.
45/50mm: The balanced all-rounders—agile enough and aerodynamic enough for solo breakaways.
55/60mm: Speed demons rejoice. Maximize aerodynamic gains on flats, time trials, and sprints with minimal crosswind compromise.
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).
Your next breakthrough starts here: wider, faster, smarter.

SPECIFICATION

ProX Road Disc 23mm Inner Width Disc Brake Carbon Road Rims 700C Tubeless Ready

Model PRD923-38C PRD923-45C PRD923-50C PRD923-55C PRD923-60C
Terrain(Recommended) Road Road Road Road Road
Material T700+T800 T700+T800 T700+T800 T700+T800 T700+T800
Weight(±15g) 390g 400g 430g 460g 480g
Max Weight Limit 115kg/253lb 120kg/265lb 120kg/265lb 120kg/265lb 125kg/275lb
Depth 38mm 45mm 50mm 55mm 60mm
Sectional Drawing 38mm depth carbon road rim wide 45mm depth carbon road rim wide 50mm depth carbon road rim wide 55mm depth carbon road rim wide 60mm depth carbon road rim wide
Outer Width 28.5mm 28.5mm 28.5mm 28.5mm 28.5mm
Inner Width 23mm 23mm 23mm 23mm 23mm
Spoke Holes 21H/24H/28H/32H 21H/24H/28H/32H 21H/24H/28H/32H 21H/24H/28H/32H 21H/24H/28H/32H
ERD* 564mm 550mm 540mm 530mm 520mm
Rim Bead Hook Hook Hook Hook Hook
Tire Type Tubeless or Clincher Tubeless or Clincher Tubeless or Clincher Tubeless or Clincher Tubeless or Clincher
Brake Type Disc Brake Disc Brake Disc Brake Disc Brake Disc Brake
Max Spoke Tension 130kgf  130kgf  130kgf  130kgf  130kgf 
Max Tire Pressure 125psi/8.6bar 125psi/8.6bar 125psi/8.6bar 125psi/8.6bar 125psi/8.6bar
Tire Size(Recommended) 700*30C-50C 700*30C-50C 700*30C-50C 700*30C-50C 700*30C-50C


calculate the ERD of road 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 PRD923-38C rim=633mm-38mm*2+3.5mm*2=564mm

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 PRD923-38C rim is 564mm+3mm*2=570mm


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 + T800 carbon fiber are used in our carbon rims. 

Combining with stable resin system to make consistent quality and light weight road bike carbon rims.

Light Weight

Light Weight

By using well designed lay-up structure, mixing Toray T700 and T800 carbon prepreg, light weight carbon rims are created.

Excessive materials are eliminated to save weight, while extra materials are added around spoke hole for reinforcement.

So, light weight is achieved without compromise in strength or stiffness.

Wider Inner Width

Wider Inner Width

Wider 23mm inner width, optimized for increasingly popular 700x30C-35C tires (also fit even wider 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. 

It is also of better stiffness and strength. 

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 getting popular in road bike carbon wheels thanks to its better traction, lower rolling resistance and better riding comfort.

All our carbon clincher rims are tubeless ready (also fit normal tube tires).

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

Road Disc Brake

Road Disc Brake

Road disc brake provides more sensitive and precise braking performance than rim brake.

Carbon fiber road bike rims designed specifically 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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