Curve Cycling
GXR4 (AKA Kevin) Frameset
GXR4 (AKA Kevin) Frameset
Customers outside Australia may be charged import fees (duties, taxes, etc) by local customs authorities upon delivery. This can add 15%-30% to your order (compared to Australian RRP). Please see our shipping policy for more information.
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Enquire
Enquire
For info on availability, please contact sales@curvecycling.com,
call us on 03 9088 0274.
Alternatively, Enquire Now.
Geometry
Geometry
You can find geometry charts for all our current frame models HERE.
Tech Info
Tech Info
- Headset Specs
- Headset Assembly & Service - IS42/52 | ZS44/EC44 | ZS44/ZS56
- Frame Specs
Shipping
Shipping
Free International Shipping for all Framesets, Complete Bikes, Forks, Wheelsets, Bars and Rocket Pooches is included in the sales price (*excludes Belgie DISC Ultegra)
All other products are subject to shipping charges calculated at checkout. See our Shipping Policy for further details.
FAQs
FAQs
Check HERE for further info regarding custom paint, bike set up and more.
| I want to attach bags. What will it do to the frame finish? |
Curve's steel frames are finished with high-quality and durable paint, but the paint is not unaffected by rubbing from bike bags or rock strikes etc. If you want to keep your paint looking pristine, we recommend that you use some kind of protective film - especially in the high-wear areas where bag straps are in direct contact with the frame. Stock Ti frames are not painted, but bag rub will affect the surface finish. The lighter, brushed, finish can be refreshed using a fine abrasive pad, but the darker blasted finish can only be refinished by media blasting. To keep your Ti frame looking pristine, we recommend using protective film. |
| I want to get a custom frame bag made. Can you give me the frame dimensions? | Of course! Have a look at our bagmaker page HERE where you can download full-scale PDFs showing the internal dimensions of all our frame models. |
| I want to use a rack. Is the frame compatible? | Yes, with a Relaxle you can use a rack on most frames regardless of whether they have integrated rack mounts or not. Some of our frames do not have upper attachment points on the seatstays (such as the Belgie range and AIR Kev for example), to get around this, you can use a seat clamp with built-in rack mounts. |
| How much weight can I carry on a rack? | The maximum weight when using the seatstay/chainstay M5 mounts should not exceed 20kg. Check the tightness of the bolts regularly! Note: This rating is for smooth roads & gravel. For anything rougher, the weight limit decreases. Use careful discretion when gauging how much weight to carry on rough gravel or off-road adventures. |
Meet the latest GXR a.k.a. Kevin
One of the first gravel-specific bikes to be sold in the mass market, the Curve GXR model has been around since gravel became cool. With wider tyre clearance, improved mounting options and UDH compatibility, the latest version of our Swiss Army Knife of bikes is more versatile than ever. We have been ahead of the Curve when it comes to gravel, and the GXR has years of adventure cycling experience woven into its DNA. The Curve titanium GXR has been tested heavily on gravel adventures worldwide. Across South America, New Zealand, Switzerland, Swaziland, and more, the Curve squad has traversed the globe on this magnificent bicycle.
Originally a playful jab at the bike industry's bike naming terminologies, the name “Kevin” soon caught on, and we couldn’t resist making it official. Kevin, the reliable Aussie all-rounder, is here to stay as a permanent nickname for our beloved GXR.
Maximum Versatility
The GXR has been designed with gravel cycling versatility in mind. While the GXR geometry is optimised for 700c x 44mm tyres, you can go as wide as 50 mm tyres on 700c wheels. In 700c mode with narrower tyre options, Kevin is ready for fast gravel missions, but you’ll be surprised how capable Kevin is on chunkier terrain with a 50 mm tyre. With 650b (27.5”) wheels you can move into gravel-plus territory with 2.2” tyres which offer plenty of comfort for the most rugged gravel adventures. Curve has the above wheel options in carbon and aluminium available and ready for complete Kevin builds.
Ready for Adventure
Our Ride 415 VGM fork has taken load carrying to the next level, with a 8 kg rating on each fork leg. That’s a total carrying capacity of 16 kg. Featuring three cleverly designed mounts on each fork leg, the Ride 415 VGM fork can accommodate anything from extra water bottles, our Rocket Pooches, or other micro-pannier or fork-specific bags. While we favour 1x drivetrains, Kevin can be set up with a 2x drivetrain without hassle. With SRAM UDH compatible dropouts, Kevin is able to handle the widest range of groupset options currently available.
More Mounting Points
The Curve Kevin comes equipped with rear rack mounts, fender mounts, 3 x bidon mounts, and top tube “bento mounts”. With extra tyre clearance, and a comparatively long wheelbase for the gravel genre which offers a more stable platform, Kevin is ready for epic day rides or multi-day bikepacking adventures, not just smooth gravel cruising.
There is ample room for bikepacking bags on all frameset sizes. To make sure current, prospective or custom bagging fits your frame size please see our Bagmaker Drawing page.
Frameset
| Frame: | Curve Titanium GXR4 - aka Kevin. At the core of each frame is a 3Al - 2.5V Grade 9 aerospace grade titanium tubeset. This grade is optimal for bicycle frames and chosen for its fine balance of stiffness, compliance and durability. |
| Fork: | Curve Ride 415 VGM Carbon Fork |
| Headset: |
Curve Integrated 42/52 mm semi-internal |
| Seat clamp: | Curve alloy 31.8 mm |
| Other: | Curve Cocky Headbadge, 12 mm Front & Rear Axles, spare SRAM UDH derailleur hanger |
If you are building your Curve frameset with a self-supplied groupset, please see the specification guide via the link below to ensure the necessary parts are sufficiently compatible with our framesets.
The specification details may change over time. Please check HERE for the latest version.
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Frameset Specifications for Self-Supplied Groupsets
Customer Reviews
Whoa ... this new Kev 4 is amazing - I "cycle" through my bikes on a regular basis - but my new Kev that I've had for the last 3 months is an absolute keeper.
It does everything - and is the closest thing to a bike for everything. I can't fault it - and I love it ! Thanks Curve Crew !!
I have been riding my GXR Kevin for only a couple of weeks, early report….. why didn’t I do this sooner, this bike is amazing, smooth, quiet, compliant. I have completed a few hundred kms with little fatigue after the ride. The team at Curve are amazing, and that’s part of the attraction of this bike. It’s not just buy the bike, “see ya”, you become part of a community with their many social and more serious adventures. Thank you all at Curve. And thanks for making Kevin such a special bike to live with.
Regards, Rod.
I have been the proud owner of Kevin (GXR4) since August.
Just a few days ago, I switched Kevin to winter set-up. Sram Eagle 38x52, so I can climb the steep mountains of the Alps with skis and load.
In summer, Kevin is fast on asphalt with 42x10 and 28’ slicks and on gravel with 650b tyres.
In Germany, the name Kevin is not very popular, but that is wrong for this bike.
Kevin is an absolute all-rounder who shows his strengths on long distances and bikepacking. I love it!
Thanks for the great support.
We are the proud owners of two Kevins one a blue Kevin of steel with 11 speed Sram and the other a Ti Kevin with 12 speed Sram AXS E-Tap. I cannot fault either bike and the Ti Kevin with Sram AXS 12 speed paired up to a 40 tooth crank and 10-52 cassette is the ultimate do anything bike, Two wheel sets one 700C running 32mm Conti GP 5000 and 10-42 cassette for the road, 700c Curve Gravel wheel set with 40mm Gravel Kings for fast gravel and 650B and 2.1" Maxxis for single track and steep goodness covers everything Im likely to ever need.
Look, I only went into Curve HQ to buy some wheels. Instead, I came home with Kevin (Rhino is very convincing) and it is fair to say he has changed my life.
I’ve raced the Pan Celtic, crossed New Zealand, numerous grand fondos on road and gravel, commuted to work, hit the MTB trails, been bikepacking - all on this incredibly versatile bike. I have no doubt that we have many more adventures to come.
On top of that, you get amazing service from the Curve crew who have built an amazing and inclusive community. These guys truly live their values, and are always there to help with any questions and advice you might need.
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