Product Details
Building upon its OPEN U.P. bike, Open Cycle has kept the same geometry and tire clearance of the U.P., but differed its carbon layup, fork, disc brake mounts, and thru-axles to create the all new OPEN U.P.P.E.R. Frameset. With its lighter weight, enhanced stiffness, and increased simplicity, the OPEN U.P.P.E.R. Frameset looks and rides like a road bike, but can also conquer the roughest dirt trails and gravel roads.
Just like the U.P., the U.P.P.E.R. bike fits up to 2.1" wide mountain bike tires, but also a 40mm wide cross tire or a 28mm road tire. All tire sizes are accommodated without affecting the handling or geometry of the bike. Thus essentially like a three-in-one bike, you can take the U.P.P.E.R. on virtually any terrain just by switching to the appropriate tires. To help accommodate bigger tires and narrower Q-factor cross/road cranks and chainrings, the U.P.P.E.R., like the U.P., uses a dropped right chainstay to create a wider area. A dropped chainstay also increases stiffness for better power transfer efficiencies.
OPEN has embraced the bike industry's love of acronyms by introducing their TRCinTRS technology, standing for The Right Carbon in The Right Spot. The best bikes are not made up of just one modulus of carbon, but instead are made from the right blend of carbon to give the bike strength, stiffness, and compliance in strategic places. OPEN uses the highest modulus carbon of any bike manufacturer where they can, and tougher grades of carbon where they must. The U.P.P.E.R.'s carbon lay-up differs from the U.P. in that it is more complex, cutting down on weight while increasing stiffness.
One of the most noticeable features of the U.P.P.E.R. and the U.P. are their extremely thin chainstays and seatstays. They are designed to be thin vertically for maximum compliance while using a lateral width and lay-up that maximizes lateral stiffness for a more efficient drivetrain that provides snappy acceleration. Also designed for maximum stiffness is the downtube. OPEN has designed a flat-out downtube whose shape allows strategically placed strips of ultra-high modulus carbon far away from the center plane, giving the maximum stiffness in a crucial area connecting the steering center to the drivetrain.
In order to maximize the flex in the seattube and seatpost, OPEN uses a 27.2mm diameter to help take the bite out of rough terrain. The seattube angle is designed around the use of a straight, zero-setback seatpost which also helps the bike shed extra grams of weight. For clean lines and protection, OPEN runs all cables and hoses internally. And with OPEN's MultiStop design, you can customize the frame for 2x10/11, 1x10/11 and Di2 shifting by just getting the right insert. If you use a single chainring, you can also remove the front derailleur hanger to further clean up the frame. Using their own unique ThruThread design, OPEN has created the first frames that combine a thru-axle with a lower weight. By redesigning the dropout in conjunction with the seatstay and chainstay, increased stiffness was achieved with the thru-axle in mind.
The U.P. uses a post-mount while the U.P.P.E.R. is designed for a flat-mount. In order to use the lightest brakes from Shimano and SRAM, a flat-mount is required. And because of the U.P.P.E.R. U-turn fork, you can make those set-ups even lighter by removing the normally required adapter. This saves weight and increases stiffness. The fork is dedicated to 160mm brake rotors and uses the same through-bolt design that is normally reserved for the rear
Extra touches on the U.P.P.E.R. include a toptube bag mount to haul your gear and a SafePost Pilot hole that indicates the minimum insertion to keep the seatpost safe and the seattube supported. Lastly, a 386 EVO Bottom Bracket is used with a wide, BB86 shell, fitting most cranks on the market including many mountain bike cranks. From this you get an incredibly stiff platform from which to produce power efficiently and give you quick acceleration on any surface.
Looking to build your new OPEN U.P.P.E.R. Frameset to your exacting specifications? Contact our OPEN Cycle and custom build experts at the shop, or shoot us an email at info@contenderbicycles.com. With a huge number of options for your wheels, drivetrain and everything in between, we can help meet any of your goals. And if you'd rather leave the choices to us, check out our list of preferred builds HERE.
*Please note that bike specifications are subject to change without prior notice |
Weight Frame-only (Size L, w/o metal parts ±3%) | 1040g (For the U.P. Model) |
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Weight Fork-only (±3%) | 390g (For the U.P. Model) |
Sizes | S / M / L / XL |
BB Standard | BB386EVO pressfit 86.5x46mm BB shell |
Recommended Groupsets | Any Shimano GRX, Any SRAM AXS, Any SRAM 1x, Campagnolo Ekar |
Front Derailleur Mount | Bolt-on, removable |
Front Thru-Axle | 100x12mm superlight Carbon-Ti X-12 |
Front Disc Rotor Size | 160mm only with Smartmount |
Front Brake Caliper Mount | Smartmount 160 system attaches flatmount caliper, without adaptor, for 160mm rotors |
Rear Thru-Axle | 142x12mm superlight Carbon-Ti X-12 |
Rear Disc Rotor Size | 140mm Smartmount or 160mm with adaptor |
Rear Brake Caliper Mount | Smartmount 140 system attaches flatmount caliper, without adaptor, for 140mm rotors or with adaptor for 160mm rotors |
MultiStop Internal System | Di2, eTap, EPS, 1x mechanical (all groups) |
Headset | Integrated IS42/28.6 | IS52/40 with 45x45 degree lower bearing (e.g., Cane Creek BAA1131 + BAA1161, Chris King DropSet 2, Token Omega A83) |
Seatpost | 27.2mm diameter, standard set-up zero-offset |
Fenders | Compatible with clip-on style fenders (Recommended: SKS Speedrocker) |
Cage Mounts | Seattube, Downtube, Under Downtube |
TT Bag Mount System | 100mm front-post-to-headset-edge |
Travel Bag Recommendation | Scicon AeroComfort Road 3.0 |
Max. Weight (Total Rider + Luggage) | 120kg / 264 lbs (EN/ISO/Internal test standard) |
Included with Frameset | Headset, Seattube Collar, Thru-Axles, 2 RD Hangers, Cover Bolts for FD Mount Posts, 1 FD Mount, 4 MultiStops (2x, 1x, Di2, eTap [only included with U.P.P.E.R.]), Cable Exit Stop, BB Guide, Cable Liners, Noise-Reduction Foam Sleeves, Bottle Cage Bolts, Manual |
Component | Sram Force AXS D2 | Sram RED AXS E1 | Sram Force AXS D2 1x XPLR | Sram Force AXS D2 1x GX | Sram Force AXS D2 1x XX1 | Shimano GRX 2X DI2 | Shimano GRX 1X DI2 | Shimano GRX 2x Mechanical | Shimano GRX 1x Mechanical |
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Levers/Calipers | SRAM Force AXS HRD eTap Shifter / Brake Lever and Caliper D2 | SRAM RED E1 AXS HRD Lever/Caliper | SRAM Force AXS HRD eTap Shifter / Brake Lever and Caliper D2 | SRAM Force AXS HRD eTap Shifter / Brake Lever and Caliper D2 | SRAM Force AXS HRD eTap Shifter / Brake Lever and Caliper D2 | Shimano ST-RX815 GRX Brake/Shift Lever + CALIPER | Shimano ST-RX815 GRX Brake/Shift Lever + CALIPER | Shimano ST-RX810 GRX Brake/Shift Lever + CALIPER | Shimano ST-RX810 GRX Brake/Shift Lever + CALIPER |
Crankset | SRAM Force Crankset - 2x 12-Speed | SRAM RED 1 AXS Crankset , 12-Speed | SRAM Force Crankset - | SRAM Force Crankset - | SRAM Force Crankset - | Shimano GRX FC-RX600 Crankset 46/30t | Shimano GRX FC-RX810-1 Crankset 42t | Shimano GRX FC-RX600 Crankset 46/30t | Shimano GRX FC-RX810-1 Crankset 42t |
Derailuer F | SRAM Force AXS eTap Front Derailleur - 2x12-Speed D2 | Red AXS Front E1 Front Derailleur - 2x12 | NA | NA | NA | Shimano FD-RX815 GRX Di2 Front Derailleur | NA | Shimano FD-RX810 GRX Front Derailleur | NA |
Derailuer R | SRAM Force eTap AXS Rear Derailleur D2 Medium Cage | Red AXS Rear E1 - 2x12 | SRAM Force AXS XPLR Rear Derailleur D2 | SRAM GX Eagle AXS Rear Derailleur | SRAM, XX1 Eagle AXS, Rear Derailleur | Shimano GRX RD-RX815 Rear Derailleur - 11-Speed, Di2 2x | GRX 1X DI2 REAR DERAILLEUR | Shimano GRX RD-RX810 Rear Derailleur - 11-Speed 2x | GRX 1X RD-RX812 REAR DERAILLEUR |
Chain | Sram Force chain | RED AXS Chain | Sram Force chain | SRAM GX Chain | SRAM X01 Chain | HG701 chain | HG701 chain | HG701 chain | HG701 chain |
Cassette | SRAM Force AXS XG-1270 12-Speed Cassette 10-36t | SRAM Red AXS XG-1290 12-Speed XDR Cassette | SRAM Force AXS XPLR 12-Speed Cassette 10-44t | GX Cassette 10-50 | X01 Cassette 10-50 | Shimano HG700 11-Speed Cassette 11-34 | Shimano CS-M7000 11-Speed Cassette 11-46 | Shimano HG700 11-Speed Cassette 11-34 | Shimano CS-M7000 11-Speed Cassette 11-46 |
Rotors | SRAM Force Rotor 160 x 2 | Sram XR Rotor x 2 | SRAM Force Rotor 160 x 2 | SRAM Force Rotor 160 x 2 | SRAM Force Rotor 160 x 2 | Shimano GRX SM-RT64 | Shimano GRX SM-RT64 | Shimano GRX SM-RT64 | Shimano GRX SM-RT64 |
Battery/Extras | Batt/Charger | Batt/Charger | Batt/Charger | Batt/Charger | Batt/Charger | Battery/Wires/Charger | Battery/Wires/Charger | N/A | N/A |
size | S | M | L | XL |
rider height¹ | 5’2"-5’8" | 5’7"-5’11" | 5’10"-6’3" | 6’2"-6’7" |
stack | 522 | 551 | 580 | 604 |
reach | 365 | 376 | 387 | 401 |
standover² | 743 | 767 | 791 | 815 |
headtube angle | 69.5° | 71.0° | 72.5° | 72.5° |
headtube length | 105 | 130 | 155 | 180 |
fork offset | 50 | 50 | 50 | 50 |
seattube length | 520 | 540 | 560 | 580 |
seattube angle | 72.5° | 72.5° | 72.5° | 72.5° |
seattube angle (norm.³) | 74° | 73.5° | 73.5° | 73.5° |
toptube length | 528 | 549 | 570 | 591 |
toptube length (norm.³) | 514 | 540 | 560 | 581 |
BB drop | 70 | 70 | 70 | 70 |
front center | 592 | 598 | 604 | 622 |
rear center | 420 | 420 | 420 | 420 |
wheelbase | 1002 | 1008 | 1014 | 1032 |