Disc Brake Symmetry
categories
new products
LightCarbon High Performance Carbon Road Wheels Light Weight Disc Carbon Wheel Ratchet Freehub • Light weight road carbon wheels, high performance • C53DB hubs with ceramic bearings, Ratchet 54T freehub • Super light Sapim CX-Ray spokes, light weight and high performance • Optional freehub: Shimano HG, MSR, SRAM XDR, Campy N3W • Widened 23mm inner width carbon rims, aero and light • Compatible for 700C*30C-50C tires more
LightCarbon Super Light Gravel Bike Wheels Full Carbon Spoke Wheels For Gravel • Full carbon spokes gravel wheel • Aero carbon spokes, ultra light and stiff • G71DB gravel specific hubs, 36T ratchet system • Shimano HG 11/12s or SRAM XDR optional • Widened 26mm inner width gravel carbon rims, tubeless ready • 40/45/50mm height optional • Fit 700x35C-50C tires more
LightCarbon 32inch MTB Rims 32er Mountain Bike Carbon Rims Tubeless Ready - Big diameter 32er MTB carbon rims - Designed for XC/All Mountain use - Asymmetric design - Hookless, tubeless ready - Light weight T700+T800 material - High quality, 2-year warranty more
LightCarbon 5-Spoke Carbon Wheels 20 Inch 406 And 451 Carbon Wheels For Folding And BMX Bikes • 20 inch 5-spoke carbon wheels • For folding bikes and BMX bikes • ETRTO options: 451mm and 406mm • 26mm outer width/19mm inner width • Disc brake hubs, 36T Ratchet freehub system • Front wheel 5*100QR, Rear wheel 5*135QR • Tubeless ready, fit 20*1.1''-1.5'' tire more
LightCarbon 3-Spoke Carbon Wheels 20 Inch 406 And 451 Spoke Wheels For Folding and BMX Bikes • 20 inch 3-spoke carbon wheels • For BMX and folding bikes • ETRTO options: 406mm and 451mm • 26mm outer width/19mm inner width • Tubeless ready, fit 20*1.1''-1.5'' tire • Disc brake hubs, 36T Ratchet freehub system • Front wheel 5*100QR, Rear wheel 5*135QR more
XXE Carbon Crank Super Light Carbon Crankset - Super Light carbon crank, only 310g! - Crank arm material: carbon fiber. - Spindle diameter options: DUB (29mm) and 24mm. - Alloy spider and Carbon spider optional. - Power Meter version is also optional. - Compatible with popular power meters like Xcadey, Sigeyi, Power2Max and Elilee EK-01 - 2 years' quality warranty more
LightCarbon Full Disc Wheel Ultra Light 27mm Wide Aero 700C Rear Disc Wheel • Ultra Light rear disc wheel, only 970g/pc! • 27mm outer (21mm inner) width • 36T Ratchet freehub system • Hub with ceramic bearings • Disc brake (center lock) • Compatible for 700*28C-45C tires more
- Widened 23mm Inner Width (29mm outer width)
- Optional rim depth: 38/45/50/55/60mm
- Clincher (Tubeless Ready)
- Wide U shape design, more aero and stiff
- High quality carbon rims, with 2-year warranty
item no.:
RD923-C Rimsproduct orgin:
Chinapayment:
Paypal, Bank transfercolor:
UD/3K(customized painting acceptable)
LightCarbon 700C Disc Brake Carbon Road Rims 29mm Outer Width (23mm Inner Width)
LightCarbon widened 23mm internal width carbon fiber road rim is released, to meet the increasing demand for wide tires. Aerodynamically optimized and available in five depth (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 (30-50C) tires, enhancing grip, comfort, and stability. Say goodbye to pinch flats and hello to smoother cornering and confident descents.
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.
Your next breakthrough starts here: wider, faster, smarter.
Features:
- 29mm width symmetric design road carbon rim for disc brake (no brake surface).
- Reinforced nipple bed, can tolerate larger spoke tension for wheel building.
- New bead lock system, better tire holding, prevent air leaking.
- Wide U shape design, of better aerodynamics and stiffness.
- High quality carbon clincher rim with 2-year warranty.
700C Road Disc Brake Carbon Rims 29mm Outer (23mm inner) Width Carbon Bike Rims RD923 Specification:
| Model | RD923-38C | RD923-45C | RD923-50C | RD923-55C | RD923-60C |
| 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 |
 |
 |
 |
 |
 |
| 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 |
* ERD Calculation
ERD is short for effective rim diameter, it is the maximum distance that spokes bridge going from one end of the rim to another.
How do we calculate the ERD of our rims? Below are calculation equation and sketch for your reference:
ERD=Rim outer diameter-(rim depth)*2+(Rim nipple bed thickness)*2
For example：
ERD of RD923-38C 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 PRD29-38C rim is 564mm+3mm*2=570mm
A: Rim nipple bed thickness (=3.5mm)
B: Length of nipple cap (2.5mm~3mm generally)
We will reply you within 24h after received your inquiry
- 25mm width symmetric disc brake road carbon clincher rim. - Reinforced nipple bed for larger spoke tension. - Wide U shape design, better aerodynamics and stiffness. - High quality carbon clincher rim with competitive price.
- Unique butterfly weave carbon rims - 33/38/45/50/55mm depths optional - 28mm outer width, 21mm inner width - Matte and glossy finish optional - Clincher (tubeless ready) - Designed for disc brake use - 2 years' quality warranty
- 28mm width symmetric disc brake road carbon clincher rim. - Reinforced nipple bed for larger spoke tension. - Wide U shape design, better aerodynamics and stiffness. - High quality carbon clincher rim with competitive price.
• Light weight road carbon wheels, high performance • C53DB hubs with ceramic bearings, Ratchet 54T freehub • Super light Sapim CX-Ray spokes, light weight and high performance • Optional freehub: Shimano HG, MSR, SRAM XDR, Campy N3W • Widened 23mm inner width carbon rims, aero and light • Compatible for 700C*30C-50C tires
- 27.5 plus full suspension Enduro ebike frameset - 12*148mm plus thru axle - Bafang M500(95NM)/M600(120NM) mid drive engine - Bafang BTF03 battery - 190*51mm standard mount rear shock size
-28mm width full disc carbon wheel - Innovative asymmetric design - PMI solid filled inside, better stiffness and strength - DT 240/DT 350/LighCarbon RT36/Powerway T01 hubs optional - High TG UD matte brake surface - 2 years quality warranty
email : info@lightcarbon.com
add : 4/F, NO.3 Bldg, Longtou Industrial Zone, NO.9 Xingmei Road, Xiamen, 361022, China
follow us :
newsletter
copyright © 2026 LightCarbon Composite Technology Co.,Ltd.all rights reserved.
the professional team to service !
