DimondMogul
Dimond's flagship beam-frame triathlon bike. Its down tube is extended into a cowling that wraps the back of the front wheel, which Dimond says saves 15 W at yaw over the Marquise at the cost of extra weight. Like the Marquise it has no seat tube and carries a large Lunch Box bento in the beam and a TOTES flat-kit box above the bottom bracket. Each frame is hand-built to order in Des Moines, Iowa, with custom paint, in limited numbers.
- From
- $10,000$10,000$10,000
- Builds
- 1
- Sizes
- 5
- Frame weight
- 1,800 g3.97 lb
Design sketch, generated from the manufacturer's photo
Our verdict
No overall score: there's no complete-bike price to rate
Dimond's most aggressive beam bike, built to order with custom paint and a wheel-shrouding down tube that Dimond credits with a 15 W saving over the Marquise. You pay a lot for a frameset only, accept extra weight and a fixed seat angle, and get big built-in food and tool storage but no hydration.
Scored Oct 2026
- + Aero-first design
AI-drafted from the specs on this page and reviewed before publishing. Scores are relative to every bike in the catalog when they were given, so they drop as newer bikes and parts raise the bar.
- Aero
- 80/100
- Frame
- 62/100
- Hydration & storage
- 78/100
- Fit
- 60/100
- Practicality
- 58/100
Aero claims and front-end integration
Carbon grade, weight and warranty
Hydration and storage in the frame
Sizes and adjustment range
Travel, standard parts, servicing
Bike duel
Frame & platform
Frame & fork
- Frame material
- Carbon fibre
- Frame weight
- 1,800 g3.97 lb
- Weight measured on
- 1.8 ± 0.05 kg, size IV (Dimond product page)
- Frame sizes
- I, II, III, IV, V
- Colours
- Custom paint included
Compatibility & standards
- Brake type
- Disc (Dimond also offers rim-brake and rim/disc combinations)
- Wheel size
- 700c
- Bottom bracket standard
- PF30 (46 mm diameter x 68 mm wide)
- Drivetrain compatibility
- Shimano Di2, SRAM eTap, mechanical (1x only)
- Mechanical shifting possible
- Yes
- 1x compatible
- Yes
Hydration & storage
- Integrated storage
- Yes
- Storage volume
- 700 ml23.7 fl oz
- Storage details
- Lunch Box bento built into the beam behind the stem: about 700 ml in sizes IV and V and 550 ml in II and III. TOTES (Tools Or Technical Equipment Storage) compartment above the bottom bracket for a tube, levers, CO2 and a small multitool.
- Top tube bento box
- Yes
Fit & adjustability
- Fit notes
- Fixed 79-degree seat angle in every size. Dimond lists a minimum saddle height per size; sizes I and II share the same frame stack and reach.
Aerodynamics
- Manufacturer aero claims
- Dimond says the Mogul saves 15 W at yaw compared with the Marquise, trading some weight, and that it does especially well in cross-headwinds.
- Testing method
- Wind tunnel (Dimond)
- Tube profile
- Cantilevered beam frame with no seat tube
Travel, maintenance & warranty
- Headset bearings
- Cane Creek IS41 (IS41/28.6 upper, IS41/30 lower)
- Frame warranty
- Frameset covered against manufacturing defects for 6 years from purchase, original owner only (not transferable); hardware, paint, graphics and Dimond forks for 1 year
- Sold via
- Direct from Dimond (custom builds via consultant or 3D configurator)
Photos
Design sketches
Builds & components
Highlighted rows differ between builds. Green marks the best value.
Mogul frameset | |
|---|---|
| Overview | |
| Price (MSRP) | $10,000$10,000$10,000 |
| Type | Frameset |
| Notes | Frameset price with custom paint included. Dimond builds complete bikes to order and quotes them individually; Slowtwitch lists a fully equipped Mogul from $21,905.21. |
Mogul price & value
Building up the Mogul frameset
Included: frame and fork only, as listed.
Still to buy: Groupset, Crankset, Cassette, Chain, Brake calipers, Wheelset, Tires, Aerobar system, Seatpost, Saddle, Pedals.
Ownership checklist
1 of 2 known checks pass, 5 not published by Dimond. Why these checks
- ✕
Threaded bottom bracket
PF30 (46 mm diameter x 68 mm wide)
- ?
UDH derailleur hanger
- ?
Standard 12×142 mm rear axle
- ✓
Works with mechanical shifting
- ?
Fits third-party aerobars
- ?
Rear disc wheel compatible
- ?
Fit kept when packed
Mogul geometry
| I | II | III | IV | V | |
|---|---|---|---|---|---|
| Rider height min | — | 152 cm5′0″ | 162 cm5′4″ | 175 cm5′9″ | 185 cm6′1″ |
| Rider height max | 152 cm5′0″ | 162 cm5′4″ | 180 cm5′11″ | 190 cm6′3″ | — |
| Stack | 490 mm19.3″ | 490 mm19.3″ | 515 mm20.3″ | 540 mm21.3″ | 585 mm23″ |
| Reach | 390 mm15.4″ | 390 mm15.4″ | 405 mm15.9″ | 425 mm16.7″ | 440 mm17.3″ |
| Seat angle min | 79° | 79° | 79° | 79° | 79° |
| Seat angle max | 79° | 79° | 79° | 79° | 79° |
| Head tube angle | 72.5° | 72.5° | 72.5° | 72.5° | 72.5° |
| Head tube length | 75 mm3″ | 75 mm3″ | 102 mm4″ | 128 mm5″ | 155 mm6.1″ |
| Chainstay | 400 mm15.7″ | 400 mm15.7″ | 400 mm15.7″ | 400 mm15.7″ | 400 mm15.7″ |
| BB drop | 75 mm3″ | 75 mm3″ | 75 mm3″ | 75 mm3″ | 75 mm3″ |
| Front centre | 570 mm22.4″ | 570 mm22.4″ | 585 mm23″ | 615 mm24.2″ | 650 mm25.6″ |
| Saddle height min | 595 mm23.4″ | 635 mm25″ | 675 mm26.6″ | 725 mm28.5″ | 785 mm30.9″ |
| Wheel size | 700c | 700c | 700c | 700c | 700c |
Side view & pad range
Drawn to scale (how to read it).
How the geometry rides
The Mogul in size III against the middle size of 29 other bikes: tendencies from geometry, not a ride review (how to read this).
- Front centre585 mm23″
shortestlonger than 29% of 29 bikeslongest
- Chainstay400 mm15.7″
shortestlonger than 25% of 53 bikeslongest
Short chainstays: a compact, responsive rear end.
Good to know
Design
The extreme down tube shape cowls the front wheel to keep airflow attached along the whole bike, which Dimond credits for most of the Mogul's aero gain.
SourceDesign
Dimond's 'more about the Mogul' page lists a frame weight of 2.08 kg and sizes II-V, while the product page gives 1.8 ± 0.05 kg in size IV and sizes I-V; the product page values are used here.
SourceIntegration
The Lunch Box bento holds about 700 ml in sizes IV and V (550 ml in II and III), which Dimond says fits about 13 gels; the TOTES box above the bottom bracket takes a flat kit and multitool.
SourceHistory
Each Mogul is handcrafted in Dimond's workshop in Des Moines, Iowa, after about two years of development.
SourceVersions
Dimond offers Mogul frames with disc brakes, rim brakes or a rim/disc combination, and makes only a limited number each year.
Source
Mogul FAQ
Is the Dimond Mogul UCI legal?+
No. The Dimond Mogul is not UCI legal. That is fine for non-drafting triathlon, but it cannot be used in UCI-sanctioned time trials.
How much does the Dimond Mogul cost?+
Manufacturer prices (MSRP): $10,000 across 1 listed build: Mogul frameset.
How much does the Dimond Mogul weigh?+
The frame weighs 1,800 g (3.97 lb) (1.8 ± 0.05 kg, size IV (Dimond product page)).
What sizes does the Dimond Mogul come in?+
5 sizes: I, II, III, IV and V. The manufacturer recommends them for riders from 152 cm (5′0″) to 190 cm (6′3″).
What seat angle does the Dimond Mogul have?+
79° effective seat tube angle.
Does the Dimond Mogul have integrated storage?+
Yes, 700 ml (23.7 fl oz). Lunch Box bento built into the beam behind the stem: about 700 ml in sizes IV and V and 550 ml in II and III. TOTES (Tools Or Technical Equipment Storage) compartment above the bottom bracket for a tube, levers, CO2 and a small multitool. A top tube bento box is integrated.
Which groupsets are compatible with the Dimond Mogul?+
Drivetrain compatibility: Shimano Di2, SRAM eTap, mechanical (1x only). Mechanical shifting can be fitted. 1x drivetrains are supported. Bottom bracket: PF30 (46 mm diameter x 68 mm wide).
What warranty does the Dimond Mogul frame have?+
Frameset covered against manufacturing defects for 6 years from purchase, original owner only (not transferable); hardware, paint, graphics and Dimond forks for 1 year
Is the Dimond Mogul aerodynamic?+
Dimond says the Mogul saves 15 W at yaw compared with the Marquise, trading some weight, and that it does especially well in cross-headwinds. (Wind tunnel (Dimond))
Sources
- https://www.dimondbikes.com/products/mogul
- https://www.dimondbikes.com/pages/geometry
- https://www.dimondbikes.com/pages/more-about-the-mogul
- https://www.dimondbikes.com/products/demo-mogul-size-iv-1
- https://slowtwitch.com/cycling/dimond-bikes-continues-to-press-forward/
- https://www.dimondbikes.com/pages/warranty-and-returns
Dimond Mogul data last updated · How the data is checked ·