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BOLA 27.5 Superlight Carbon MTB Rim | 36mm Wide, 30mm Internal

BOLA 27.5 Superlight Carbon MTB Rim | 36mm Wide, 30mm Internal

$310.00 USD
$350.00 USD $310.00 USD
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The Bola 27.5" superlight carbon MTB rim — a 30mm internal, 30mm-high trail/cyclocross hoop at about 370g, tubeless-ready in Toray carbon.

When the trail narrows and grip must be bought in volume, a featherweight rim lets the bike float over the rough rather than grind through it. This 27.5" Bola rim answers with an ultra-low ~370g and a 30mm inner channel.

Buying Guide.

Weight tier - Ultralight ~370g: a single-tier race-and-trail build - the lightest 27.5" option, climbing and accelerating like a hoop a class up, so choose it for speed over outright impact margin.

Tire & terrain: the 30mm channel takes 2.25-2.6" MTB rubber and 35-48mm cyclocross tires at moderate tubeless pressure - a versatile middle ground for trail, mixed terrain and cyclocross.

Same-family: the 27.5" 34mm-inner rim (~390/440g, $310) runs wider for enduro support; choose this 30mm when speed and climbing win out.

Rider guidance ~110kg - build within that ceiling.

Target Audience & Usage Notes.

Trail, cyclocross and all-mountain riders who value responsiveness.

Rider guidance ~110kg; disc brake only.

Build rim-only with a disc hub and keep spoke tension under 300kg.

The Ride That Awaits.

Spin it up and you will feel the saving - this featherweight floats over the rough instead of grinding through it, making every climb a little kinder. Point it at berms and mixed terrain and the tubeless bed holds its line lap after long lap. A 3-year rim warranty and direct-from-factory shipping mean you build it and forget it.

Specifications
Size: 27.5
Material: Genius Toray carbon fiber
Rim Depth: 30mm
Bead Type: Hookless
Inner Width: 30mm
Outer Width: 36mm
ERD (Effective Rim Diameter): 540mm
Weight Tier: Superlight 370g
Trade-offs & Considerations
Aero vs Crosswind: The 30mm depth and 36mm outer width favor traction and compliance over aero; the 30mm internal bed runs lower pressures for grip, with low aero priority at MTB speeds.
Weight vs Stiffness: At 370g (Superlight) the rim saves about 150–200g per rim versus a typical alloy rim of the same width (±5g); the trade-off is a layup tuned for XC and trail rather than enduro abuse.
Tire-Type Trade-off: The hookless bed runs 2.25–2.6" MTB or 35–42mm cyclocross tires tubeless at 45–65 psi; hookless requires tires certified for hookless rims.
Sourcing & Delivery Trade-off: Stock drilling ships in 1–3 business days at $310; a custom spoke count or decals add 7–15 business days and roughly a $40–80 premium.
Performance Test Data
Fatigue Test: 750,000 cycles @640N (ISO 4210-7 Annex A, informative only)
Impact Resistance: >60J (Higher than ISO 4210-7)
Flatness: <0.25mm (internal QC)
Roundness: <0.3mm (internal QC)
Max Spoke Tension: >350 kgf (internal QC, spoke breaking tension)
Ultimate Strength: >100 kgf (internal QC, static spoke-hole point load)
Dynamic Equilibrium: <3g (internal QC)
Radial Stiffness: 90–110 N/mm (internal lab)
Lateral Stiffness: ≥8 N/mm
Max System Weight: 110kgs
Recommended Use Cases
XC / Marathon Build: At 370g the 27.5" rim saves roughly 150-200g versus an alloy rim of the same 30mm internal width, built for XC and marathon pace rather than enduro abuse.
Trail Build: The hookless 30mm bed runs 2.25-2.6" tubeless MTB tyres at low pressure; the 32/32 drilling and impact-reinforced bead (>60J) add durability for singletrack.
Cyclocross / Gravel Build: The same 30mm bed also seats 35-48mm cyclocross tyres, so one rim platform doubles as a CX or light-gravel build on a 650b disc frame.
Not Recommended For: Enduro or downhill rock strikes - the layup is tuned for XC and trail - and tyres not approved for hookless rims.
Compatibility
Frame Compatibility: 27.5" / 650b frames with disc brake mounts
Tire Type: Tubeless-ready, hookless compatible
Tire Width Range: 2.25"-2.6" MTB; 35-48mm cyclocross
Brake Standard: Disc only
Drivetrain: Any (depends on hub and freehub)
Rotor Standard: Disc (6-bolt or centerlock depending on hub)
How It Compares
ModelWeightDepthWidthPrice
27.5 30mm Rim 36mm Superlight 370g 30mm 36mm See store
DT Swiss XRC 1200 Spline 1303g 20mm 30mm inner (36mm outer) €2,499
Mavic Crossmax Carbon 1395g 25mm 30mm $3,049
Fulcrum Red Zone Carbon 1445g 26mm 27mm €1,434
FAQ
Do I get a bare rim here, or is it built up with a hub and spokes?
It's a bare carbon rim — no hub, spokes or nipples. Take it to any wheel builder to lace it to your own hub; we can also supply a built wheel on request.
What spoke drillings are available, and which brake type is this rim rated for?
Spoke drillings and brake rating depend on the build option, selectable at checkout. If you plan to lace your own wheel, confirm the drilling and brake type with Bola before ordering so the rim matches your hub and frame.
What spoke tension can I safely build to — will the holes pull out of the carbon?
Drive-side / disc-side maximum tension is 130–140 kgf, with the non-drive side adapted to match; the spoke holes are locally reinforced inside the carbon layup to prevent pull-out cracking.
Will the rim crack on rock gardens or bottom-outs at low pressure?
The bead area uses a thickened impact-reinforced layer; impact testing passes >60J extreme impacts (above the ISO 30J standard). Inner widths of 30mm accept wider tyres, which deform to absorb shock at low pressure.
Will I really pay no customs or VAT for delivery to the US and EU?
Yes. The Economy channel ships DDP — duties and VAT are fully prepaid by us, cleared in advance, and delivered to your door with no extra payment to customs or the courier.
Warranty & Shipping
Warranty Period: 3 years
Crash Replacement: 30% discount on replacement parts within 1 year of the original purchase date
Processing Time: In stock: 1–3 business days · Out of stock or custom order: 7–15 business days
Shipping method: FedEx/UPS/DPD/EMS Economy (free with duties & VAT included in USA & EU) · Expedited option available
Estimated Delivery: Economy 7–20 business days · Expedited 3–7 business days, customs clearance excluded
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