MODERN CLASSIC
This is a very different OPEN yet it answers the same question: What do we want to ride? While we love pushing the envelope, we also love the classic bike aesthetic. In the MIN.D. both come together.
The joy of cycling starts even before the first pedal stroke, as you collect your MIN.D., feel its lightness, admire the sleek tube profiles, see the shimmering midnight blue, smile at the splash of color from the 4 OPEN logo colors fading into each other on the inside of the fork and chainstays.
Once on the bike, a strange combination of performance and comfort becomes apparent. Every gram of material has a function. Beyond it is nothing, other than the endless draw of roads unknown. This is the MIN.D. (MINimal Design); it exists because it’s the road bike OPEN wanted to ride.
WHAT IS THE MIN.D.?
- A high performance road bike frame using OPEN’s ultra-efficient tube shaping for power transfer, low weight & high strength
- Continuous seattube design for extreme comfort without gimmicks
- Tire clearance for modern road tires up to 32mm (since tire labelling is unreliable, always check tire clearance with the frame)
- Available in standard 2x and dedicated 1x version
- Classic, understated look in both shaping and color.
COMFORT
Comfort is not about gimmicks, elastomers, electronic suspension or sub-atomic vibration damping graphene-infused nano-particles. It's about finding ways to ride further, for longer, while enjoying it.
A comfortable fit geometry comes first. Our aim is sportive (we still want to go fast) but with a realistic saddle-to-handlebar drop and reach.
Secondly, bad roads are one of the worst comfort killers, whether through cracks and potholes or simply through vibrations. Making your tires a tad larger is the most effective comfort boost while also improving rolling resistance and grip.
Finally, we create comfort through the frame shape and layup, in particular the seattube/seatmast and the seatstays.
CONTINUOUS SEATTUBE
The continuous seattube design is extremely small at 25mm diameter (30mm is normally the minimum if you want to fit in a 27.2mm seatpost). This change adds astonishing comfort to the frame. Removing the seatpost/seattube overlap at the toptube also means the seattube compliance continues uninterrupted.
Our own minimalist seattube top clamp is nearly invisible yet easily adjustable by 0-15mm and slip-proof. We even have our special MOCT saddle clamp (Measure Once Cut Twice) which is adjustable from 15-35mm. This also makes it much easier to resell your frame later on, although you probably never want to lose your MIN.D.
And don’t worry about traveling with the seatmast. We recommend the Scicon Aerocomfort 3.0 which let’s you travel without even removing the saddle (up to 80cm saddle height) or by removing the saddle+top clamp (up to 85cm saddle height). You don’t even have to remove the handlebars or twist them; all you do is remove the wheels and pack the bike. This bags fits tons of gear, rolls well and offers great protection.
SIMPLICITY
It may sound weird that we consider this one of the most important features of the MIN.D. But as Dieter Rams said: “As little design as possible” (we highly recommend the documentary and the book). This is a pure road bike, and nothing more. Simply because it doesn’t have to be anything else.
NEW ROAD HANDLING
We’ve done a lot of work on steering geometry in the past five years. Some of you in the Basel area may have seen us ride around on weird concoctions with adjustable headtube angles and chainstay lengths.
The MIN.D, takes everything we’ve learned from our road bike test mule and our gravel bike on/off-road geometry experiments, putting it back into a pure road bike geometry
R-TURN
The OPEN U-Turn was the first fork truly optimized for flatmount brakes by deleting the standard adaptor to switch between 140mm and 160mm disc rotors (you should always use 160mm rotors anyway for added safety & control at almost no extra weight). The adaptor is a feature without a benefit at the expense of weight, stiffness and complexity.
The R-Turn uses the same Smartmount direct-mount design with thru-bolts without adaptors, just like the rear brake. Together with new shaping and a new layup optimized for road, the R-Turn is the lightest disc brake road fork available.
Note: For SRAM or Shimano, remove the adaptor and use bolts recommended for a 30mm “rear chainstay thickness”. For Campagnolo, use a “140 mm REAR" disc caliper with bolts “for 30-34 mm rear mount”.
GEOMETRY
| S | M | L | XL | |
| rider height1 | 5’3"-5’7" | 5’6"-5’11" | 5’10"-6’3" | 6’2"-6’8" |
| BB-to-saddle rail max.2 | 700 | 740 | 780 | 820 |
| saddle height max.2 | 740 | 780 | 820 | 860 |
| Di2 saddle height5 | 690 | 710 | 735 | 755 |
| stack | 535 | 560 | 585 | 610 |
| reach | 361 | 373 | 385 | 397 |
| standover3 | 743 | 769 | 792 | 816 |
| headtube angle | 71° | 72.5° | 72.5° | 72.5° |
| headtube length | 135 | 158 | 184 | 210 |
| fork offset | 50 | 50 | 50 | 50 |
| seattube length (BB-to-top of TT) | 467 | 491 | 514 | 537 |
| seattube angle | 72.5° | 72.5° | 72.5° | 72.5° |
| seattube angle (norm.4) | 74.0° | 73.5° | 73.5° | 73.5° |
| toptube length | 530 | 550 | 569 | 589 |
| toptube length (norm.4) | 515 | 540 | 559 | 589 |
| BB drop | 73 | 71 | 71 | 71 |
| front center | 578 | 584 | 604 | 623 |
| rear center | 405 | 405 | 405 | 405 |
| wheelbase | 971 | 978 | 998 | 1018 |
| 1 | Estimates; for accuracy use stack/reach of your current gravel/road bike or a fit session. |
| 2 | Maximum when using 5mm spacer, giving 10mm safety margin on top (30mm margin with MOCT seattube top clamp). Assuming 40mm rail-to-saddle deck (40-45mm is standard for most saddles). |
| 3 | Standover to the top of the toptube directly above the BB (varies with tire size). |
| 4 | Normalized dimensions to compare to frames with standard (non-zero-offset) seattubes. |
| 5 | The length of seatmast needed to install a Shimano Di2 Battery results in this minimum achievable saddle height (including safety margin) |
| MIN.D. | MIN.D. California | |
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| Frameset Price (USD, excl. sales tax) |
$3,900
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$7,500
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| Stock colors |
Midnight blue with 4-color fade, RTP (Ready-To-Paint for custom painting (inspiration gallery, see here). TOUCH-UP PAINT for stock colors can be found here.
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RAW, custom (inspiration gallery, see here).
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| Frame-only size L, w/o metal parts, ±3% |
870g (RTP, incl. full mast)
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775g (RAW, incl. full mast)
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| Fork-only weight, ±3% |
335g (uncut steerer)
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| Sizes |
S/M/L/XL
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| RTP (Ready-to-paint) |
A clearcoat is not needed for UV protection but recommended to protect against scratches and wear. Some customers leave the frame bare.
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| BB standard |
BB386EVO pressfit 86.5x46mm BB shell
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| Recommended groupsets |
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| Front derailleur mount |
Standard version with fixed, riveted FD mount and dedicated 1x version without FD mount
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| Rear thru-axle |
142x12mm superlight Carbon-Ti X-12
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| Front thru-axle |
100x12mm superlight Carbon-Ti X-12
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| Front disc rotor size |
160mm only
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| Front brake caliper mount |
Smartmount 160 system attaches flatmount caliper, without adaptor, for 160mm rotors
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| Front brake bolts SRAM |
2x 37mm "REAR” brake bolts for 30mm “chainstay” (SRAM part# 00.5318.005.008)
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| Front brake bolts Shimano |
2x 43.2mm “REAR” brake bolts for 30mm “chainstay” (Shimano part# Y8N208030)
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| Front brake set-up Campagnolo |
“140mm” (rear) caliper + 160mm rotor, no adaptors, 2x 39mm "screws for 30-34 mm rear mount thickness” (Campagnolo part# AC18-DBSC39)
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| Rear disc rotor size |
160mm only
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| Rear brake caliper mount |
Smartmount 160 system attaches flatmount caliper, without adaptor, for 160mm rotors
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| Rear brake bolts SRAM |
1x 27mm (SRAM part# 00.5318.005.004), 1x 32mm (SRAM part# 00.5318.005.006)
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| Rear brake bolts Shimano |
1x 33.2mm (part# Y8N208010), 1x 38.2mm (part# Y8N208020)
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| Rear brake set-up Campagnolo |
“140mm” (rear) caliper +160mm rotor, no adaptors, 1x 29mm “screw for 20-24 mm rear mount thickness” (part# AC18-DBSC29), 1x 34mm “screws for 25-29 mm rear mount thickness" (part# AC18-DBSC34)
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| MultiStop internal system |
Di2, eTap, EPS, 1x mechanical (all groups)
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| Headset |
Cane Creek Integrated IS42/28.6 | OPEN-custom Integrated IS47/38 (complete set part# CAA2011K. To purchase, go here.)
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| Seatpost |
Integrated mast 25mm BB to saddle (to travel with the integrated mast, we recommend the Scicon Aerocomfort 3.0)
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| Seattube top clamp |
OPEN-custom saddle top clamp with micro-wedge for 25mm seat mast with 15mm adjustment (MOCT top clamp with 15-35mm adjustment available separately)
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| Rail clamp |
Ritchey rail clamp with side plates for round 7x7 and oval 7x9.6mm rails included
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| Travel Bag Recommendation |
Scicon AeroComfort Road 3.0. Scicon has an easy WILL YOUR BIKE FIT tool. (use your current bike setup for dimensions A, B & D and use the wheelbase in our geometry chart below for dimension C).
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| Indoor trainer compatibility |
Detailed information here
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| Installation information |
Brake hose installation
Torque specs & BB installation
Seatmast installation video
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| Max. weight (total rider+luggage) |
120kg / 264 lbs (EN/ISO/internal test standard)
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| Warranty |
Detailed information here
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Included with frameset: Headset, Seattube top clamp, Rail clamp, Thru-axles, 2 RD hangers, 2 MultiStops (Di2, eTap), cable exit stop, noise-reduction foam sleeves, bottle cage bolts, manual
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