Cerchio Gravel in carbonio 700c 30mm — Tubeless-Ready | Bola
Cerchio Gravel in carbonio 700c 30mm — Tubeless-Ready | Bola
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Il cerchio gravel asimmetrico in carbonio Bola 700c a V — un profilo da 30mm di profondità e 30mm di larghezza (335-405g) in carbonio Toray T700/T800 per gravel e all-road.
Per le lunghe giornate sullo sterrato, il comfort e il supporto contano più della pura velocità. Una larghezza esterna di 30mm offre un reale supporto alla spalla degli pneumatici gravel larghi, mentre un offset asimmetrico di 2,6mm bilancia la tensione dei raggi.
Guida all'acquisto.
Livello di peso - Ultralight ~335g: la versione orientata alla salita per ciclisti più leggeri, circa ~80kg - veloce sulle salite gravel a pieno carico.
Livello di peso - Superlight ~365g: l'opzione versatile per ciclisti fino a ~95kg - per gareggiare e pedalare senza margini troppo sottili.
Livello di peso - Normal ~405g: la versione per carichi pesanti per ciclisti fino a ~105-120kg - sceglila per il bikepacking e le strade accidentate dove la durata è fondamentale.
Larghezza interna - 24 o 25mm: scegli quella più stretta per uno pneumatico da gara più reattivo, quella più larga per uno pneumatico gravel voluminoso a bassa pressione su percorsi sconnessi.Della stessa famiglia: questo è il cerchio più basso e confortevole della linea gravel di Bola; il cerchio gravel da 40mm ($310) aggiunge aerodinamicità per i settori gravel veloci.
Omologato per un peso di sistema di 105kg.
Target di riferimento e note sull'utilizzo.
Gravel racing, bikepacking, gran fondo e all-road.
Peso massimo di sistema 105kg; non adatto a gare su strada pure o MTB.
Solo per freni a disco.
La guida che ti attende.
Carica la bici per una lunga giornata su sterrato e senti come il cerchio assorbe le vibrazioni: pneumatici larghi, bassa pressione, una ruota che trasporta il tuo equipaggiamento senza problemi. Affronta i sentieri accidentati con compostezza, assorbendo le pietre che farebbero vibrare un cerchio stretto. Scegli la laminazione adatta al tuo carico e lascia che la garanzia di 3 anni sul cerchio si faccia carico dei rischi.
Specifications
- Material: Toray UD carbon
- Rim depth: 30mm
- External width: 30mm
- Internal width: 24/25mm
- Size: 700c (ISO 622)
- Profile: Asymmetric V-shape
- Weight Tier: Normal 405g, Superlight 365g, Ultralight 335g
- Max Tire Pressure: 90
Trade-offs & Considerations
- Weight vs Durability: Choose from 405g (Normal), 365g (Superlight), or 335g (Ultralight) per rim. Lower weight reduces rotating mass for climbing but decreases load capacity and durability; Normal tier supports up to 120kg rider weight, Ultralight only 80kg.
- Tire Volume vs Speed: 30mm outer width supports 32-54mm tires for comfort and traction on gravel, but the wider profile increases drag compared to narrower aero rims. The 30mm depth favors stability over pure aero efficiency.
- Stiffness vs Compliance: The asymmetric 2.6mm offset and Toray T700/T800 construction provide lateral stiffness for precise handling, while the wide rim bed and tubeless setup allow lower pressures for compliance. However, stiffness is not as high as deeper-section rims, trading some responsiveness for ride comfort.
- Versatility vs Specialization: This rim is designed for gravel, endurance, and all-road use, accommodating various tire widths and tubeless setups. It is not optimized for pure road racing aerodynamics or heavy-duty MTB use, making it a versatile but not fully specialized choice.
Performance Test Data
- 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: 105kgs
Recommended Use Cases
- Gravel Racing: Good choice for mixed-terrain racing with wide tire support and reliable construction.
- Bikepacking: Good for loaded adventures; Normal tier supports up to 120kg rider weight for heavy loads.
- Gran Fondo / Endurance: Suitable for long rides with comfort from wide tire compatibility and tubeless setup.
- Road Racing: Not recommended; 30mm depth and wide profile lack aero efficiency for competitive road racing.
- Training / Daily Riding: Suitable for everyday riding; durable construction and tubeless compatibility make it practical.
- Not Recommended For: Heavy-duty MTB downhill or track use; this rim is optimized for gravel and all-road, not aggressive off-road or velodrome.
Compatibility
- Frame Compatibility: 700c / ISO 622 compatible frames
- Tire Type: Tubeless and clincher
- Tire Width Range: 27-42mm
- Brake Standard: Disc brake only
- Drivetrain: Compatible with all drivetrains
- Rotor Standard: N/A (rim only)
How It Compares
| Model | Hub | Spoke | Bearing | Weight | Depth | Width | Price |
|---|---|---|---|---|---|---|---|
| Bola 30 | N/A | N/A | N/A | 335-405g | 30mm | 24/25mm | see store |
| G30 | N/A | N/A | N/A | 350g | 30mm | 30mm | ~$1200 |
| 303 | N/A | N/A | N/A | 390g | 30mm | 30mm | ~$900 |
| Terra | N/A | N/A | N/A | 370g | 30mm | 30mm | ~$800 |
FAQ
How do I set up this rim tubeless?
Use a standard 6.5mm tubeless valve and tape the rim bed with tubeless tape. The hookless bead design ensures a secure fit. Inflate the tire to seat the bead, typically requiring a compressor or high-volume pump. Recommended tire pressures range from 30-50 psi depending on rider weight and terrain, but always follow tire manufacturer guidelines.
What tire widths are compatible?
The rim supports tires from 32mm to 54mm wide. The 30mm outer width provides strong sidewall support for wider gravel and all-road tires. The inner width is available in 24mm or 25mm, allowing a good range of tire volumes. For optimal performance, consider tires around 40-50mm for gravel riding.
How much weight can I save compared to an alloy rim?
The carbon rim weighs between 335g and 405g per rim depending on tier, while a comparable alloy rim often weighs 500-600g. This saves 100-200g per rim, reducing rotating mass and improving acceleration and climbing. The specific savings depend on the alloy rim you compare against and the chosen weight tier.
Can I build this rim with any spokes or hubs?
Yes, the rim supports custom spoke drilling for straight-pull or J-bend spokes with a 4.5mm nipple seat. This allows compatibility with a wide range of hubs and lacing patterns. Ensure you use appropriate spoke lengths for your chosen hub and lacing pattern. The asymmetric 2.6mm offset improves spoke bracing angle for disc brake wheels.
How do I maintain and inspect this rim for damage?
Regularly inspect the rim for cracks, delamination, or impact damage, especially after rough rides. Check spoke tension and true the wheel as needed. Avoid overheating the rim by using rim brakes for long descents; this rim is designed for disc brakes. Clean with mild soap and water, and avoid harsh solvents. The three-year warranty covers manufacturing defects.
Warranty & Shipping
- Warranty Period: 3 years for rims / 2 years for wheelsets
- Warranty Coverage: Manufacturing defects on carbon structure
- Crash Replacement: 30% discount within warranty period
- Processing Time: 1–3 business days; 7–15 business days for custom or out-of-stock items
- Shipping Method: FedEx / UPS / DPD Economy (free, duties & VAT included) · Expedited option at checkout (duties & VAT payable on delivery)
- Estimated Delivery:Economy 7–20 business days · Expedited 3–7 business days, excluding customs clearance
- Packaging: Double-wall carton with foam protection
