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ProX Disc Brake Undulating Rim Depth Carbon Clincher Rims

• Undulating rim depth (45/50, 53/58mm)

• 26mm width, disc brake, 21H or 24H

• Aero and stable in all wind conditions

• Carbon clincher rims (tubeless ready)

• Super light & standard weight optional

  • Brand:

    PROX

  • Item NO.:

    URD26 Undulating

  • Payment:

    Paypal, Bank Transfer

  • Origin:

    China

  • Color:

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

With no shortage of carbon bike road rims in the market, ProX has launched unique Undulating Road Disc series rims. As the name suggests, such disc carbon road rim is with varying depth. For example, measured from spoke hole area, the URD26-450 rim is with 50mm depth and in between it drops to 45mm. This mid-depth profiles wave up and down 5mm for better aero performance and crosswind stability. It allow the riders to handle the bike better especially in the wind. 

For the present, undulating disc brake rims are both available in conventional 24 spoke holes and 21 spoke hole(usually for 2:1 hubs), designed for road riding use. The rim is specific reinforced to each spoke hole drilling in the deeper area to increase rim strength and stiffness as well.

The rim has a hook bead design and is tubeless compatible. Tubeless tires can make a good performance at lower tire pressure for reduced rolling resistance and contribute to all out speed.

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

26mm width Undulating Depth carbon road rims

Standard weight version (without “SL” on the rim model name, such as URD26-580) carbon rim is made from Toray T700 carbon fiber which is the basis to make high strength bike carbon rims. The max rider weight limit is 120kg/265lb.

Super light weight version (with “SL” on the rim model name, such as URD26-580-SL) carbon rim is made from premium Toray T800 carbon fiber to achieve super light weight, which is more suitable for lighter weight riders (max weight limit 100kg/220lb). 

Both standard weight version and super light weight versions are optional for undulating rims.

Such new aerodynamic design road disc carbon rims help to minimize wind drag and improve stability in crosswinds obviously. It will bring you a faster and more confident riding experience.

SPECIFICATION

ProX 26mm Width Undulating Road Disc Carbon Clincher Rims 700C Tubeless Ready

Model URD26-450-SL URD26-450 URD26-580-SL URD26-580
Terrain(Recommended) Road Road Road Road
Material T800 T700 T800 T700
Weight(±15g) 420g 450g 450g 500g
Spoke Hole Options 21H or 24H 21H or 24H 21H 21H
Outer Width 25.5mm 25.5mm 25.5mm 25.5mm
Inner Width 19mm 19mm 19mm 19mm
Depth 45-50mm 45-50mm 53-58mm 53-58mm
Max Weight Limit 100kg/220lb 120kg/265lb 100kg/220lb 120kg/265lb
Sectional Drawing 26mm width carbon rims undulating
Rim Offset 0mm 0mm 0mm 0mm
ERD* 540mm 540mm 524mm 524mm
Rim Bead Hook Hook Hook Hook
Tire Type Tubeless or Clincher Tubeless or Clincher Tubeless or Clincher Tubeless or Clincher
Brake Type Disc Brake Disc Brake Disc Brake Disc Brake
Max Spoke Tension 130kgf 130kgf 130kgf 130kgf
Max Tire Pressure 125psi/8.6bar 125psi/8.6bar 125psi/8.6bar 125psi/8.6bar
Tire Size(Recommended) 700*25C-40C 700*25C-40C 700*25C-40C 700*25C-40C


If you are interested in disc brake carbon wheels 21H(2:1 drilling) or looking forward to the wheels with carbon spokes built with our URD (undulating rim depth carbon rims), please click the link or contact us for more details. 

carbon bike wheels disc brake


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 URD26-450 rim=633mm-50mm*2+3.5mm*2=540mm

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 URD26-450 rim is 540mm+3mm*2=546mm


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 and 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

Regular Inner Width

Regular 19mm inner width, optimized for 700x25C and 700x28C tires (also fit even wider tires).

Wider stance for tire, easy tire mounting and dismounting.

Better traction and cornering performance.

Undulating Rim Depth

Undulating Rim Depth

The mid-depth profile waves up and down 5mm for better aero performance and crosswind stability. 

Such design help to improve bike handling, bring you a faster and more confident riding experience.

In addition, the stiffess and strength are also improved. 

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 carbon road 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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