The OB1 AXS Custom

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Overview Specs Geometry FAQ The original, reimagined. With a crisply shifting wireless electronic SRAM AXS 1x drivetrain, hydraulic brakes, and wide range 12 speed cassette, the OB 1 AXS 1x is equipped to handle the steepest pitches you point it up, or down. Our premium aluminum cockpit components round out a parts spec that won’t let you down or leave you wanting. Chase down roadies, explore some new singletrack, or load up for a long adventure. Join the N=1 revolution. Current lead time: Current inventory is limited by COVID related supply chain interruptions. Please contact us for the most up to date lead times at [email protected]: ~18.5 lbs (size M, standard seatpost)Arrives 85% assembled (see prep guide) Why you'll love the OB1 Endurance road geometry for all day comfort and balanced handling. Bombproof carbon wheels built for speed, strength, and durability at a race-ready weight. Choose between 650Bs and 700Cs, or swap 'em in 90 seconds. Tubeless done right with high-volume tires matched to wide rims for easy set-up, lower pressures, fewer flats, and an extra smooth ride. Gearing for every adventure SRAM AXS wireless electronic drivetrain offers crisp shifting with a light touch. Massive range cassettes gives you a bailout gear for the steepest climbs and loaded bikepacking trips, while maintaining the top end you need to keep pace on a spirited road ride. SRAM GX AXS clutched derailleur prevents chain drop and chain slap, with a cage-lock feature on the rear derailleur that makes it super easy to swap wheels or fix a flat. Obsessive on the details A creak-free bottom bracket from Wheels Manufacturing with silicone dust covers, oversized stainless steel bearings, and a 2-piece aluminum shell that threads together for proper bearing alignment and support. A remarkably comfortable saddle for all day riding. Dual-sprung star-ratchet hubs for outstanding strength and reliability. Optional dropper seatpost for enhanced control and confidence off-road and on. Specs Chassis | Cockpit | Drivetrain & Braking | Wheels Click on the name of each component to learn more about why we chose it. Every detail, down to the bolts and bearings, is selected for the optimal balance of performance, durability, and serviceability. To learn more about our approach, check out how we built a high-end carbon dream bike. CHASSIS FRAME Thesis OB1 Carbon DETAILS - Endurance road geometry- Clearance for 650B x 47mm or 700C x 40mm tires - Discreet mounting points for: (5) bottle cages, racks, bento, and clip-on accessories- Clean internal routing for hoses and full cable housings, with foam sleeves sheathing for sound dampening- Round, dropper-ready 27.2 seat tube- Accommodates up to 46T single or 50/34T double chainrings- Reinforced Toray 800/700 blend carbon construction- Fiberglass anti-corrosive layer at seatpost, bottom bracket, and headset interfaces- 1145g +/-5% (medium, black finish, frame w/o hardware) Choice of: XS, S, M, L, XL (See Geometry) WHY WE CHOSE IT From road to gravel to travel, our OB1 frameset is ready for every road. Its sleek road-bike design hides clearance for wide dirt tires and discreet mounting points for bags, fenders, racks, extra bottles, and everything else the ride demands. From reinforcement at every hole and boss, to anti-corrosive fiberglass where carbon meets metal, to bolt-secured aluminum cable guides, we've invested in the details to deliver you performance without compromise. FORK Thesis OB1 Carbon with SteerSafe DETAILS - Steersafe-reinforced carbon steerer- Clearance for 650b x 47mm | 700c x 40mm tires- Accommodations for fenders, headlight, light, and bottle cages- 12x100mm thru-axle dropouts- Reinforced Toray 800/700 carbon construction- ~495g total with SteerSafe installed WHY WE CHOSE IT We created SteerSafe to ensure your carbon steerer is fully supported against stem clamping forces. SteerSafe is an aluminum tube with built-in starnut that gets bonded into our carbon steerers at the factory. To shorten a SteerSafe equipped steerer, simply cut through the carbon and aluminum layers using a guide and a carbon-specific blade as you would a normal carbon steerer, then use ultra-fine sandpaper to create a smooth, slightly rounded edge. Finish by torquing the lubricated stem bolts to 5 Nm. THRU-AXLES Thesis Stealth Hollow Thru-Axle DETAILS - Hollow bolt-on with 6mm hex head- 12mm front | rear- Thread length and pitch matched to OB1 frame/fork- Machined 7075 aluminum- ~82g/set WHY WE CHOSE IT Each thru-axle is machined from a single billet of ultra-premium 7075 aluminum. With a built-in washer for smooth installation, our bolt-on thru-axles offer stiffness, security, and easy wheel removal without the extra ~100g of weight of levered designs and uses a 6mm hex wrench. SEATPOST CLAMP Thesis Flush DETAILS - Standard interface for even clamping- Steel bolt & threaded insert for trouble-free adjustment WHY WE CHOSE IT OB1's seat clamp achieves its integrated look while utilizing a traditional clamping interface that, unlike many proprietary integrated designs, evenly distributes clamping forces. This helps prevent damage to frame or post, post slippage, or post binding (dropper post). We finish it off with a lubricated nut and bolt for a lifetime of trouble-free use. Be sure to coat your seat post with grip paste before installing. HEADSET Thesis Oversized Integrated DETAILS - Upper: 41.8x30.5x8 | 45°x45°- Lower: 51.9x40x8 | 45°x45°- Sealed upper cap- Replaceable aluminum split crown race WHY WE CHOSE IT Selected for durability, OB1's extra large 1-1/2” angular contact lower cartridge bearing distributes the extreme loads this component experiences over more and larger balls. The sealed top cap provides an extra barrier to water penetration and its replaceable aluminum split crown race protects the carbon steerer crown from wear while being less prone to creaking than non-split races. While it adds a handful of grams relative to smaller diameter options, we don't believe in shedding weight at the expense of durability. DERAILLEUR HANGER Thesis Replaceable DETAILS - 1-bolt replaceable- Stiff for use with long-cage derailleurs- Axle threads directly into the hanger- Extra included just in case WHY WE CHOSE IT Flexy derailleur hangers compromise shifting and are quick to fail. OB1's is stiff and strong to withstand the greater loads placed on it by today's long-cage derailleurs and wide range cassettes, but will still sacrifice itself to protect the derailleur and frame in the event of a major impact. And don't worry - we include an extra just in case. MOUNTING POINTS Click for details Mounting points for all your gear:- 2 bottle mounts in the front triangle- 1 bottle mount below the downtube- 1 bento mount on the top tube- 2 bottle mounts on the fork blades- Front and rear fender mounts (seat stay bridge included)- Wide central clamping area on handlebar Note: For optimum performance, load your heaviest items in a frame bag secured in the main triangle. We do not recommend using bolt on racks.Max weight of rider + gear: 115kg (254lb) COCKPIT STANDARD SEATPOST SEATPOST Thesis Ultralight 3D Forged DETAILS - 1-piece 3D forged 2014-T6 aluminum quill- Micro-adjustable 2-bolt clamp- Broadly supportive lower clamp- 0 offset to match OB1's 73° seattube angle- ~230g (400mm), ~210g (350mm) WHY WE CHOSE IT OB1's seatpost weighs less than some carbon posts yet is safe to use with clamp-on accessories like bikepacking seat bags. Its quill is forged from a single billet of ultra-premium 2014-T6 aluminum for excellent strength to weight. The 2-bolt head and oversized lower clamp plate offer superior saddle security, support, and micro-adjustability. This seatpost can be shortened using a standard steerer cutting guide and 32TPI hacksaw blade. Just be sure that there's at least 105mm of insertion into the frame (more is better) and that you sand or file the cut edges to round them off and remove burrs. DROPPER SEATPOST (+$149) SEATPOST Thesis 27.2 Integrated Dropper Seatpost DETAILS - Infinitely adjustable- Lightweight 1-piece forged head and quill- Secure 2-bolt saddle clamp with broad rail support- Premium 7075-T651 aluminum construction- Clean internally-routed design- Serviceable with readily available parts- Tests to an ISO MTB standard- Actuated by Crank Brothers Highline Drop Bar lever- 405L|110mm (~485g), 360L|90mm (~460g), 310L|70mm (~425g)Pro Tip: Choose the longest dropper that fits your frame size and saddle height (see geo chart). WHY WE CHOSE IT A dropper post is a total game-changer. Dropping the saddle out of the way allows you to shift your center of mass down and back over the rear wheel, keeping your front end light and freeing your legs to act as suspension. The result is increased control, speed, and confidence over steep or aggressive terrain. They're even great for fast road descents. We've been riding droppers on our drop-bar bikes since before it was cool, so whether you're looking to get shreddy off-road or just want to feel safer on that high speed road sweeper, a dropper is an option well worth considering.Want to learn more? Check out our deep dive. HANDLEBAR Thesis Compact Ergo Flare DETAILS - 116mm drop | 75mm reach | 10 ° flare- Comfy flat top sections- Wide 100-180mm x 31.8mm clamp area- Double butted 6061 aluminum (420mm uses 2014 aluminum)Choice of: 360, 380, 400, 420, 440mm widths (center-to-center at the hoods) WHY WE CHOSE IT Aero on the tops, control and comfort in the drops. With a short reach, shallow drop, and subtle 10° of flare, our handlebar keeps you narrow when motoring on the hoods while offering greater leverage when cornering, descending, or shredding dirt in the drops, all while reducing back and wrist strain. Its wide central clamping area allows you to attach a bell, GPS, bar bag, aero clip-ons, or all 4 at once if that's what your adventure requires. STEM Thesis Ultralight DETAILS - 3D forged 7050 aluminum- 7° angle- ~105g (100mm)Choice of: 70, 80, 90, 100, 110, 120 mm lengths WHY WE CHOSE IT A top-of-the-line stem equivalent to others retailing at $100+, our 7050-series aluminum stem is strong and stiff yet lighter than others' $300+ carbon stems. SADDLE Thesis Endurance 148 Saddle DETAILS - 148 width- 244 length- Wide, supportive nose- Pressure relieving padding and cutout- Hollow Cr-Mo rails (260g) or Carbon rails (~205g) WHY WE CHOSE IT Wide, short, cut-out saddles like this one first gained popularity among triathletes and time-trialists looking for improved comfort over long stints in extremely aggressive positions. Eventually roadies and mountain bikers discovered their benefits and brought them into their disciplines as well. With a bit more cushion for mixed terrain riding and hollow Cr-Mo rails for outstanding strength, this is a saddle meant for long days on rough roads.We spec our Endurance 148 saddle across our entire line of bikes. Our riders love it so much that many have outfitted their entire stable with them. DRIVETRAIN & BRAKING CHAINRING Thesis Narrow-Wide Direct Mount Single, SRAM Force AXS 42T DETAILS Thesis Narrow-Wide Direct Mount - Narrow-wide - Direct mount for stiffness, weight, & easy swapping- Long-wearing 7075 aluminum- Standard SRAM-type 3-bolt interface | 6mm offset- ~99g (42T)Choice of: 38, 40, 42, 44, and 46 tooth options SRAM Force AXS 42T - 42T WHY WE CHOSE IT Machined from a single plate of long wearing 7075-series aluminum to eliminate every unnecessary gram, our chainrings feature contoured narrow-wide teeth for smooth, drop-free operation and direct-mount interfaces for a stiffer and lighter overall system. Mixed-terrain riding often requires ultra low gearing, particularly when slogging gear up steep dirt roads. Paired with a 10-50T cassette, a 42T chainring offers a monster 520% range with considerably more low end grunt than most 2x options for steep dirt climbs while maintaining plenty of top end for high speed road descents. CASSETTE SRAM Eagle XG-1275, e*thirteen Helix R DETAILS SRAM Eagle XG-1275- 520%% range - ~450ge*thirteen Helix R- 556% range- 9-50T - ~345g WHY WE CHOSE IT SRAM's XG-1275 offers expanded range at a reasonable pricepoint. Sporting 12 speeds and 520% range, you'll always have the right gear for your fitness and terrain.Immense gear range without a weight penalty makes the e*thirteen Helix R an excellent choice for a number of use cases. The 9-50T offers a best in class 556% range, with a 9T overdrive gear that won't spin out when chasing a fast group ride down a fast road descent, and a 50T bailout gear for plenty of low-end grunt for even the steepest climbs. REAR DERAILLEUR SRAM GX AXS Eagle 12spd Electronic DETAILS - AXS wireless electronic- Cage-lock feature for easy wheel swaps- Roller bearing clutch eliminates derailleur bounce and chain slap WHY WE CHOSE IT With identical shift quality to their top-end XX1 AXS offering, SRAM's GX AXS electronic rear derailleur offers wireless 12 speed electronic shifting with the ability to accomodate a massive 52T cog. SHIFTERS & BRAKES SRAM Rival AXS HRD Electronic/Hydraulic DETAILS - Wireless 12-speed electronic shifting- Powerful, easily modulated hydraulic disc braking- Reach adjust to fit hands of all sizes WHY WE CHOSE IT SRAM's Rival AXS levers take the excellent shifting and braking we've come to love SRAM, with light-touch wireless electronic shifting. CRANK Thesis Hollow-Forged BB386EVO, SRAM Force 1 DUB Carbon 12spd DETAILS Thesis Hollow-Forged BB386EVO - Stiff, hollow box-section arms- Lightweight & tough 7075 aluminum- Wide-stance BB386 spindle (30 x 86.5mm)- SRAM-type 3-bolt direct mount chainring interface- 1-bolt removable drive-side arm- Compatible with 4iiii power meters- ~625 grams (172.5mm)Choice of: 155, 160, 165, 170, 172.5, 175mm SRAM Force 1 DUB Carbon 12spd - 42T chainring- Lightweight carbon arms- DUB-standard 29mm spindleChoice of: 165, 170, 172.5, 175mm WHY WE CHOSE IT Strong, Stiff, Light: Pick 3. How do you create a crank that achieves extraordinary stiffness-to-weight in an easily serviceable package that isn't afraid of a rock strike? Take two billets of ultra premium 7075 aluminum. Smash each under 600 tones of force to form two hollow, box-section arms. Then take another billet of that same alloy and machine it into a large diameter BB386 spindle to push the bottom bracket's oversized bearings as far apart as possible for even more stiffness and durability. Sandblast rather than polish all surfaces to pound-out microfractures, and anodize everything for an even harder and longer-wearing finish. SRAM's Force 1 AXS carbon crankset offers the best combination of light weight, durability, and gearing range of any crankset within SRAM's line. We went with their 42T chainring for an optimal balance of top-end speed and low-end grunt, allowing you to tackle everything from screaming road descents to loaded dirt climbs. BOTTOM BRACKET Wheels Manufacturing Thread-Together BB386EVO DETAILS - Precision-milled, thread-together aluminum shell- Premium 6806 stainless steel sealed cartridge bearings- Silicone dust covers- Built to the open BB386EVO standard- 126g WHY WE CHOSE IT Wheels Manufacturing's precision-milled, thread-together bottom bracket is strong and stiff to ensure proper bearing alignment and support, with silicone dust covers for an extra layer of protection against water and dirt. It's the same solution that mechanics turn to when the cheap, plastic press fit bottom brackets inevitably start to creak and fail. It adds quite a bit of cost and a handful of grams, but we think the increased durability, efficiency-under-load, and general peace-of-mind are well worth the investment. CHAIN SRAM GX Eagle Powerlink 12spd DETAILS - Chrome hardened pins- Anti-friction and anti-corrosion finishes- Includes quick link- 244g (114 links) WHY WE CHOSE IT Chains are a wear item that should be checked, cleaned, lubed, and replaced frequently for optimal performance and to preserve your expensive chainrings, cassettes, and derailleur pulleys. Within SRAM's line, we chose the GX 12-speed chain for its hardened steels and anti-friction/anti-corrosion finishes. ROTORS SRAM Centerline Centerlock 160mm DETAILS - Stainless steel- 160mm front | rear- Centerlock WHY WE CHOSE IT SRAM's Centerline 160mm rotors offer a blend of power, modulation, smooth operation, and heat-management. We chose a Centerlock interface for easier installation and removal. CHARGER SRAM AXS Powerpack Single Battery Charger DETAILS - Single-port USB charger for SRAM eTAP AXS batteries WHY WE CHOSE IT An electronic drivetrain won't do you much good without a means to charge it, so we of course include a charger with every bike. Want to build your own OB1 from the ground up? Check out our Frameset Module option. WHEELS Lōgōs Epoché 700C RIMS Lōgōs Epoché 700C DETAILS 24ID|32W|30D Aero-optimized for 28/30mm tires Wide enough to support 40mm+ tires 2.5mm of asymmetry for balanced spoke tensions Bead hooks for blow-off prevention & non-tubeless compatibility Angle drilling & reinforced nipple seat for durability Blended-modulus T800/700 unidirectional construction 20 - 110psi Show more