• Close-up of Bola 45mm carbon rim surface texture showing unidirectional T700/T800 carbon weave
  • Tubeless-ready carbon road rim schematic, Bola 700c 45mm U-shape, bead profile highlighted
  • 29er Asymmetric Carbon MTB Rim | 30mm Height, 30mm Inner Width | Freeride & Enduro Bola
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Bola 700C 50mm Asymmetric Carbon Tubeless Rim | 28mm Wide

Bola 700C 50mm Asymmetric Carbon Tubeless Rim | 28mm Wide

$310.00 USD
$350.00 USD $310.00 USD
Sale Sold out
Free shipping  |  VAT included in EU & USA
Weave
Spoke QTY
Weight

The Bola 700C 50mm offset U-shape carbon tubeless rim - a 28mm-wide Toray aero rim for all-round road, climbing and aero builds.

The versatile aero rim: the Bola 50mm offset U-shape tubeless pairs a 50mm aero profile with a 28mm wide bed - deep enough to hold speed, light enough to climb. Fifty millimetres of T700/T800 carbon, sold rim-only.

Buying Guide.

Weight tier - Extreme Light ~370g: the all-rounder's light end - light for climbs while holding 50mm of aero.

Weight tier - Ultralight ~390g: the balanced middle - the sweet spot for most all-round racers.

Weight tier - Superlight ~430g: the sturdy build - impact margin for mixed surfaces.

Weight tier - Standard ~470g: the durable daily choice for heavier riders and rough roads.

Max rider weight: rated to 120kg - check rider + gear before ordering.

Same-depth series: the 50mm road/gravel rim is the wide-outer road version; the 50mm gravel rim is the wide gravel sibling.

Adjacent depth: the 40mm asymmetric tubeless climbs better; the 55mm asymmetric tubeless goes deeper.

Target Audience & Usage Notes.

Target audience.: All-round road racers and gran fondo riders.

Rim-only.

Seat tubeless beads with a compressor; respect 110 psi and 120kg.

Not for pure climbing or aggressive gravel.

The Ride That Awaits.

Pair it with a quality hub, run a 28-32c tubeless, and the wheel simply says yes: it holds speed on the flat, climbs willingly, and calms the gusts as if they never came. Light for a 50mm aero rim - ready for everything you ask of it. Free shipping, a 3-year rim warranty and crash-replacement discount.

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  • Wheelset weight (+/-2% tolerance, excluding rim tape and valves): Extreme Light 370g / Ultralight 390g / Superlight 430g / Standard 470g (+/-10-15g)
  • Rim depth: 50mm
  • External width: 28mm
  • Internal width: 21mm hooked / 23mm hookless
  • ERD: ~560mm (estimated)
  • Spoke Holes: 20/20 (20/24/28/32 configurable)
  • Tubeless: Tubeless-ready clincher
  • Hooked/Hookless: Hooked or hookless
  • Max Tire Pressure: 110 psi
  • Max System Weight: 120kg (prose 110kg)
  • Material: T700/T800 Toray UD carbon
  • Brake Type: Disc or rim brake (hub-dependent)
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  • Delivery vs Price: Factory-direct at $310 per rim (roughly half the cost of a single branded rim), but overseas dispatch takes 7-20 business days via FedEx/UPS/DPD Economy. Comparable Zipp 404 Firecrest ~$2,300-$1,600+ each.
  • Aero vs Weight: 50mm depth with a 370g Extreme Light tier is the best aero-to-weight balance in the asymmetric family.
  • Weight vs Durability: 370g Extreme Light suits riders under ~90kg; Standard 470g is tougher.
  • Rim-only Build: Hub, spokes and tape sold separately; ERD not explicitly stated -> .
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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 / Roundness: <0.25mm / <0.3mm (internal QC)
  • Max Spoke Tension: >300kg (internal QC)
  • Radial / Lateral Stiffness: 90-110 N/mm radial; >=8 N/mm lateral (internal lab)
  • Dynamic Balance: <3g (internal QC)
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  • Road Racing Builds: 2026 peloton standard is 28-30mm tubeless on wide rims (TdF 2026 avg ≈30mm); 50mm section suits 40+ km/h racing.
  • Gran Fondo / Endurance: Modern 2026 frames (Propel, SuperSix, S5) design around 30-32mm clearance; 21mm inner bed pairs 25-32mm tubeless per ETRTO 2026 guidance.
  • Wheel Building: Custom road builds with disc or rim hubs; UD carbon layup options for weight-conscious or durable builds.
  • Weight Tier Selection: Offered in weight tiers (120kg (prose 110kg)); lighter for climbing, heavier for training and impact margin.
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  • Frame: 700C (ISO 622) road frames; disc or rim brake per hub
  • Tire Type: Tubeless-ready clincher
  • Tire Width: 25-40mm
  • Valve: Presta
  • Brake: Disc or rim brake (hub-dependent)
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Bola 50mm 28mm Carbon Road Rim - - - Extreme Light 370g / Ultralight 390g / Superlight 430g / Standard 470g (+/-10-15g) 50mm 21mm hooked / 23mm hookless $310
Model A - - - 411-415g 50/56mm 32mm $1,095
Model B - - - ~420g 45/50mm 28.2mm ~$1,400
Model C - - - ~400g 50mm 28mm ~$220
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What is the Bola 50mm Offset U-Shape Tubeless Rim and what is included?

A single bare carbon rim, sold rim-only with no hub, spokes, nipples or tape - built to your choice of components or used as a single-rim replacement.

What tyre sizes fit?

25-40mm tubeless; 28-32mm is the aero sweet spot.

Hooked or hookless?

Choose hooked (21mm, higher pressure, more tyres) or hookless (23mm, more volume, ETRTO-certified tyres at 72-87 psi).

Is 50mm good for climbing?

Yes - 370g Extreme Light is light for a 50mm rim; it is the best aero-to-weight balance in the family.

What is the ERD?

ERD not explicitly stated on the page - confirm with Bola before ordering spokes.

How long is shipping and what warranty applies?

Free shipping, VAT included in EU & USA. 3-year rim warranty against manufacturing defects with crash-replacement discount. Dispatch 1-3 business days; FedEx/UPS/DPD Economy delivers in 7-20 business days.

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