Bola 700C 88mm Deep Aero Carbon Tubeless Rim | 26mm Wide TT Triathlon
Bola 700C 88mm Deep Aero Carbon Tubeless Rim | 26mm Wide TT Triathlon
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The Bola 700C 88mm U-shape carbon tubeless-ready rim - the deepest rim in the Bola line, 26mm wide, for pure time-trial and triathlon flat-course builds.
When every second and every watt counts, the Bola 88mm TT rim delivers - a full-deep U-shaped weapon engineered for the sustained high-speed efforts of time trial and triathlon. Eighty-eight millimetres of Toray carbon, 26mm wide, sold rim-only.
Buying Guide.
Weight tier - Superlight ~650g: the flat-course racer's pick - lightest end, for a dedicated TT build on smoother courses.
Weight tier - Standard ~690g: the durable choice - more layup margin for heavier TT riders and rough out-and-back tarmac.
Max rider weight: rated to 125kg - check rider + gear before ordering.
Same-depth series: the 65mm tri rim is shallower and calmer; the 60mm U-shape tubeless is the disc-brake road version.
Adjacent depth: no Bola rim goes deeper than 88mm - this is the maximum-depth option.
Target Audience & Usage Notes.
Target audience.: Time-trial and triathlon riders building dedicated flat-course wheelsets.
Rim-only.
Use a compressor to seat tubeless beads; use carbon-specific rim-brake pads and watch heat on descents; respect 120 psi and 125kg.
Not for climbing, road racing or crosswinds.
The Ride That Awaits.
Lace it to a dedicated TT hub and bladed spokes, seat a 28mm tubeless, and the flat becomes your theatre: 88mm of U-profile slicing air, the wheel tracking like a rail as the kilometres fall away. Pure aero, pure out-and-back, pure speed. Free shipping, a 3-year rim warranty and crash-replacement discount.
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- Material: Toray Carbon
- Rim depth: 88mm
- External width: 26mm
- Internal width: 20mm
- Size: 700C
- Profile: U-shape
- Weight Tier: Standard 690g / Superlight 650g
- Max Tire Pressure: 120
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- Aero vs Climbing: The 88mm deep U-shape profile provides excellent aerodynamic efficiency for TT and triathlon, but adds significant weight (~690g/650g) compared to shallower rims, making climbing less efficient. On steep grades, the rotating weight will be noticeable.
- Stiffness vs Compliance: Full carbon construction delivers high lateral stiffness for precise handling, but the deep, wide profile can transmit road vibrations, sacrificing some compliance. The 25mm outer width allows for lower tire pressures (down to ~80 psi) to improve comfort.
- Tire Volume vs Speed: The 18mm internal width supports tires from 25-32mm, allowing wider tires for lower rolling resistance and comfort, but at the expense of aerodynamic drag compared to narrower tires. Optimal width for speed is around 28mm with this rim.
- Weight vs Durability: Choose the Standard (690g) for more durability and impact resistance, or the Superlight (650g) to save 40g per rim, but at a potential cost of long-term strength. Both are ISO tested, but the lighter version may be more prone to damage from curb strikes.
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- Fatigue Test: 750,000 cycles @640N (ISO 4210-7 Annex A, informative only)
- Impact Resistance: >40J (ISO 4210-7 reference)
- Flatness: <0.25mm (internal QC)
- Roundness: <0.3mm (internal QC)
- Max Spoke Tension: >300kg (internal QC)
- Ultimate Strength: >100kg (internal QC)
- Dynamic Equilibrium: <3g (internal QC)
- Radial Stiffness: 90–110 N/mm (internal lab)
- Lateral Stiffness: ≥8N/mm
- Max System Weight: 125kgs
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- Sprinting / Criterium: Suitable
- Triathlon / TT: Excellent
- Road Racing: Good
- Gran Fondo / Endurance: Suitable
- Climbing / Hill Repeats: Not recommended
- Not Recommended For: Climbing / steep terrain
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- Frame Compatibility: 700C road, TT, or triathlon frames with rim brakes
- Tire Type: Clincher (tubeless-ready)
- Tire Width Range: 25-36mm
- Brake Standard: Rim brake (carbon-specific brake pads)
- Drivetrain: N/A (rim only)
- Rotor Standard: N/A (rim only)
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|---|---|---|---|---|---|---|---|
| Bola 88mm | — | — | — | 690g (Standard) | 88mm | 20mm | see store |
| Aero88 | Novatec | Pillar | Steel | 720g | 88mm | 25mm | ~$550 |
| Tri88 | Bitex | Sapim | Steel | 700g | 88mm | 25mm | ~$650 |
| Speed88 | DT Swiss | DT Aerolite | Ceramic | 680g | 88mm | 25mm | ~$800 |
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How do I set up tubeless tires on this rim?
This rim is tubeless-ready, meaning you can mount tubeless tires without a tube. Apply tubeless tape to the inner channel (18mm), install the valve, and use a tubeless-compatible tire. Inflate with a high-volume pump or compressor to seat the bead; the recommended maximum pressure is 125 psi. For best results, use a sealant like Stan's No Tubes.
What tire sizes are compatible with this rim?
The rim has an internal width of 18mm and an external width of 25mm, optimized for tires between 25mm and 32mm wide. This range balances aerodynamics and rolling resistance, with 28mm tires often providing the best all-around performance. Wider tires up to 32mm can be used for enhanced comfort, but may slightly increase drag.
How much weight can I save with the Superlight version?
The standard rim weighs approximately 690g, while the Superlight version weighs about 650g, saving 40g per rim. This reduction is achieved through layup optimization without compromising the structural certifications. For a pair, that totals an 80g saving, which can slightly improve acceleration and climbing performance.
Can I use this rim with any hub for custom builds?
Yes, this rim is designed for custom wheelbuilding. With a 462mm ERD and 6.5mm Presta valve hole, it is compatible with most road hubs and spokes. Use a standard 2-cross or 3-cross lacing pattern, and ensure your spokes are the correct length. The rim supports a maximum spoke tension of 280kg, providing a solid base for reliable builds.
How do I inspect the rim for damage or delamination?
Regularly check the rim for hairline cracks, bulges, or discoloration, especially after impacts. Delamination is a risk for carbon rims; listen for unusual sounds during braking and visually inspect the brake track. Use a coin tap test: a dull thud may indicate internal separation. If you suspect damage, stop using the rim and consult a professional. The rim is warrantied against manufacturing defects for 3 years.
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