Some love the action, some ride to relax. So we offer this page in two themes:   ZEN ROCK & ROLL

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 we 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)
  • Classic, understated look in both shaping and color

COMFORT

So much is said about comfort, but it’s not about gimmicks, elastomers, electronic suspension or sub-atomic vibration damping graphene-infused nano-particles. Comfort is about finding ways to ride further, for longer, while enjoying it.

That means first of all a comfortable geometry, something we worked hard at on our last generations of gravel bikes and have transferred back to the MIN.D. Our fit geometry is sportive (we still want to go fast) but with a realistic saddle-to-handlebar drop and reach. Our steering geometry is different from the traditional road bike standard, coupling agile handling to rock-solid stability.

Secondly, comfort means space for large road tires. 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 solution, with the added benefit of lower rolling resistance and better grip.

Finally, we create comfort through the frame, in particular the seattube/seatmast.

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.

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”.

WIRE-STAYS

Vertically thin chainstays and seatstays provide compliance, while their lateral width and layup ensure rock-solid propulsion. Truly the best of both worlds.

MINIMALIST TOP CLAMP

OPEN-custom seattube top clamp with micro-wedge is barely visible, just the two countersunk set screws reveal the adjustment mechanism.

RITCHEY RAIL CLAMP

Clean, simple, hassle-free, that’s why the Ritchey system is so popular. The MIN.D. comes standard with the side plates for round 7mm and 7x9.6mm oval rails.

INTERNAL ROUTING

The MIN.D, internal routing is designed for electronic groupsets but also compatible with the newest generation Shimano mechanical drivetrains.

THRUTHREAD DROPOUTS

This design uses the same threads to hold the thru-axle and lock the derailleur hanger into the frame. Simpler, lighter, optimized for the stiffest thru-axle: Syntace X-12.

SMARTMOUNT

SMART-MOUNT 160

Flatmount brake calipers attach directly onto the fork & frame, positioned for 160mm discs. No front or rear adaptors/spacers required.

FRAME SPECIFICATIONS

Frame-only size M, ±3%
870g (painted, uncut seatmast, w/o metal parts)
Fork-only weight, ±3%
335g (uncut steerer)
Sizes
S/M/L/XL
Stock colors
Midnight blue, RTP
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.
BB standard
BB386EVO pressfit 86.5x46mm BB shell
Front derailleur mount
Yes
Rear thru-axle
142x12mm superlight Carbon-Ti X-12
Front thru-axle
100x12mm superlight Carbon-Ti X-12
Front disc rotor size
160mm only
Front brake caliper mount
Smartmount 160 system attaches flatmount caliper, without adaptor, for 160mm rotors
Front brake bolts SRAM
2x 37mm "REAR” brake bolts for 30mm “chainstay” (SRAM part# 00.5318.005.008)
Front brake bolts Shimano
2x 43.2mm “REAR” brake bolts for 30mm “chainstay” (Shimano part# Y8N208030)
Front brake bolts Campagnolo
Use Campagnolo SuperRecord “140 mm REAR” disc caliper with 1 bolt “for 20-24 mm rear mount” and 1 bolt “for 25-29mm rear mount” to attach directly to the R-Turn fork
Rear disc rotor size
160mm only
Rear brake caliper mount
Smartmount 160 system attaches flatmount caliper, without adaptor, for 160mm rotors
Rear brake bolts SRAM
1x 27mm (SRAM part# 00.5318.005.004), 1x 32mm (SRAM part# 00.5318.005.006)
Rear brake bolts Shimano
1x 33.2mm (part# Y8N208010), 1x 38.2mm (part# Y8N208020)
Rear brake bolts Campagnolo
Use Campagnolo SuperRecord “140 mm REAR” disc caliper with 1 bolt “for 20-24 mm rear mount” and 1 bolt “for 25-29mm rear mount”
MultiStop internal system
Di2, eTap, EPS, 2x mechanical (Shimano-only), 1x mechanical (all groups)
Headset
Cane Creek Integrated IS42/28.6 | OPEN-custom Integrated IS47/38 (complete set part# CAA2011K)
Seatpost
Integrated mast 25mm BB to saddle
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)
Rail clamp
Ritchey rail clamp with side plates for round 7x7 and oval 7x9.6mm rails included
Indoor trainer compatibility
Detailed information here
Installation information
Brake hose installation
Torque specs
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
Frameset Price (USD, excl. sales tax)
$3,600
Pre-order (ships July 20)

NOTE: Prices are excl. VAT, import duties and other fees. Contact your retailer or us for more info.

GEOMETRY

 SMLXL
rider height15’3"-5’7"5’6"-5’11"5’10"-6’3"6’2"-6’8"
BB-to-saddle rail max.2
700740780820
Saddle height max.2
740780820860
stack
535560585610
reach
361373385397
standover3743769792816
headtube
angle
71°72.5°72.5°72.5°
headtube
length
135158184210
fork
offset
50505050
seattube
angle
72.5°72.5°72.5°72.5°
seattube
angle (norm.4)
74.0°73.5°73.5°73.5°
toptube
length
530550569589
toptube
length (norm.4)
515540559589
BB
drop
73717171
front
center
578584604623
rear
center
405405405405
wheelbase9719789981018
1Estimates; for accuracy use stack/reach of your current gravel/road bike or a fit session.
2Maximum 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).
3Standover to the top of the toptube directly above the BB (varies with tire size).
4Normalized dimensions to compare to frames with standard (non-zero-offset) seattubes.
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