Bola 700C 180mm Deep Aero Carbon Tubeless Rim | 28mm Wide TT Triathlon

Q: What tire sizes are compatible with the BOLA 180mm rim?

The rim has an inner width of 21.5mm and outer width of 28mm, optimized for 25-32mm tires. For tubeless setups, we recommend 25mm for aero, up to 28mm for comfort, and 32mm for gravel. Avoid narrow tires below 23mm as they may not seat well on the wide rim.

Q: How to set up tubeless tires on this rim?

Use a tubeless-compatible tire and sealant. Apply soapy water to the bead, inflate with a compressor or high-volume pump until the bead seats (typically around 60-80 psi). Then deflate to your desired pressure, between 100-125 psi as rated. Ensure the hooked bead engages properly; the rim meets ETRTO standards.

Q: What is the weight savings compared to a clincher rim?

The rim weighs approximately 815g ±20g itself, which is lightweight for a 180mm deep section. When built into a wheelset with appropriate spokes and hubs, you can save 300-500g compared to a standard alloy aero rim. However, actual savings depend on the build.

Q: Can I build this rim with any hub and spokes?

The rim is drilled for standard J-bend spokes (likely 20/24 holes) and is compatible with most road hubs. We recommend using high-quality butted spokes and a tension of 100-120 kgf for best durability. Consult a professional wheel builder for optimal lacing.

Q: How should I inspect and maintain the rim for safety?

Regularly inspect the rim for cracks, delamination, or impact damage, especially after hard rides. Check spoke tension periodically to ensure evenness. The rim is designed for up to 125kg rider weight; exceeding this could cause failure. Clean with mild soap and avoid abrasive cleaners. If you notice any carbon defects, replace the rim.

$450.00 USD

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Weave UD Matt UD Glossy 3K Matt 3K Glossy Marble Matt Marble Glossy

Spoke QTY 24 28 Customized

Weight Standard Super Light

The Bola 180mm deep aero carbon rim - an extreme 180mm UV-profile TT/triathlon rim, 28mm outer / 21.5mm internal, ~815g, hooked tubeless, for rear-wheel aero builds.

The deepest whisper of speed Bola makes - 180mm of carbon resolve, built for courses where the horizon runs flat and the clock is the only judge.

Buying Guide.

Use case: the maximum-aero rear rim for wind-protected, flat TT and triathlon courses only.

Course judgement: choose it for flat, neutral-wind events; it is the most crosswind-sensitive option and penalises climbs.

Tyre choice: run 25-28mm high-pressure race tyres on the narrow internal bed.

Same-depth series: the 120mm aero rim ($420) is lighter and more manageable; the 90/95mm wave rim ($350) is calmer in gusts.

Adjacent depth: nothing in the Bola range goes deeper - step down to the 120mm rim for any wind or rolling terrain.

Rear wheel only; pair with a calmer front and respect the system weight limit.

Target Audience & Usage Notes.

TT/triathlon rear-wheel builds on flat, wind-neutral courses.

Rear wheel only; 25-32mm tubeless/clincher, 100-125 PSI. 125kg rider limit.

Pair with a calmer front.

Not for general road riding, climbing or windy races.

The Ride That Awaits.

Built as a rear wheel it cuts a startling, solid silhouette - on a flat, windless course it seems to pull you forward by will alone.

Everything but the straight ahead falls away.

Free shipping and a 3-year rim warranty see you to the start line.

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Material: carbon
Rim depth: 180mm
External width: 28mm
Internal width: 21.5mm
Size: 700C
Profile: aero deep-section
Weight Tier: 815g
Max Tire Pressure: 125

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Aero vs Climbing: 180mm depth maximizes aerodynamics at 45+ km/h but adds ~815g per rim, making climbing less efficient. Trade-off: ~0.8-1.0 kg for a pair adds rolling weight that affects accelerations.
Crosswind vs Aero: Deep 180mm profile is highly aero but noticeably affected by crosswinds, especially over 15-20 km/h side gusts. Riders may need to adjust steering inputs.
Stiffness vs Compliance: High-modulus carbon offers high lateral stiffness (≥8N/mm) but vertical compliance is reduced; the 21.5mm inner width allows lower pressures for some compliance, but overall it is designed for stiffness over comfort.
Tire Volume vs Speed: 28mm outer width accommodates up to 32mm tires, giving more volume and grip, but the deep rim aero benefit is maximized with narrower tires (25-28mm). Balanced choice between rolling resistance and aerodynamic drag.

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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: N/A

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Sprinting / Criterium: Not recommended
Triathlon / TT: Excellent
Road Racing: Suitable
Gran Fondo / Endurance: Not recommended
Climbing / Hill Repeats: Not recommended
Not Recommended For: Technical circuits, windy conditions, and hilly courses

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Frame Compatibility: Fits standard 700C road frames; ensure clearance for 28mm external width.
Tire Type: Tubeless or clincher with hooked bead
Tire Width Range: 25-32mm
Brake Standard: Not specified; compatible with rim or disc brake depending on build
Drivetrain: Compatible with any drivetrain depending on hub
Rotor Standard: Not applicable; rim only

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BOLA 180	BL180	Hyper Carbon	TPI Ceramic	815g	180mm	21.5mm	see store
Aero 180	DT 240	Sapim CX-Ray	Ceramic	~1000g	180mm	28mm	~$2500
TT 180	DT 240	Sapim CX-Ray	Ceramic	~1050g	180mm	28mm	~$2200
Tri 180	DT 240	Sapim CX-Ray	Ceramic	~980g	180mm	28mm	~$2000

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What tire sizes are compatible with the BOLA 180mm rim?

The rim has an inner width of 21.5mm and outer width of 28mm, optimized for 25-32mm tires. For tubeless setups, we recommend 25mm for aero, up to 28mm for comfort, and 32mm for gravel. Avoid narrow tires below 23mm as they may not seat well on the wide rim.

How to set up tubeless tires on this rim?

Use a tubeless-compatible tire and sealant. Apply soapy water to the bead, inflate with a compressor or high-volume pump until the bead seats (typically around 60-80 psi). Then deflate to your desired pressure, between 100-125 psi as rated. Ensure the hooked bead engages properly; the rim meets ETRTO standards.

What is the weight savings compared to a clincher rim?

The rim weighs approximately 815g ±20g itself, which is lightweight for a 180mm deep section. When built into a wheelset with appropriate spokes and hubs, you can save 300-500g compared to a standard alloy aero rim. However, actual savings depend on the build.

Can I build this rim with any hub and spokes?

The rim is drilled for standard J-bend spokes (likely 20/24 holes) and is compatible with most road hubs. We recommend using high-quality butted spokes and a tension of 100-120 kgf for best durability. Consult a professional wheel builder for optimal lacing.

How should I inspect and maintain the rim for safety?

Regularly inspect the rim for cracks, delamination, or impact damage, especially after hard rides. Check spoke tension periodically to ensure evenness. The rim is designed for up to 125kg rider weight; exceeding this could cause failure. Clean with mild soap and avoid abrasive cleaners. If you notice any carbon defects, replace the rim.

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