Curve GXR

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  • Lately I had been thinking that it might be time to finally accept that gears aren’t the enemy and invest in a do it all steel road bike.
    Last weekend I happened to be passing Cloud9 so I thought I’d enquire about test riding a Brother Stroma. I got chatting with Adam and about 30 minutes later The Stroma somehow became a Curve GXR.
    I picked the frame up today, and will hopefully have this up and running fairly quickly.

    The plan so far is:
    Sram Red 1X chainset with a 42t chainring
    Sram force 11 speed cassette
    Sram force shifters/derailleur
    Some ritchey drop bars I have lying around
    Whatever seatpost I find in my parts bin
    Probably a stripped SLR for the saddle

    I’ll be borrowing the hunt wheels off my Trek for now but I have some Light Bicycle carbon rims that I’ll be building up shortly.

    In the long term I want to get this down to around 7kg so I’ll be swapping things out for lighter parts when I can.


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  • @Tijs I believe this is the bike you'll be building next spring.

  • Nad and bw speakers i hope.

  • Looks fantastic but I'd expect it to weight more like 9kg with light parts.

  • It’s not as heavy as you’d think, frame is 2.2kg, fork is 500g. With light wheels and a few bits of carbon it shouldn’t be too hard to get it down to 7kg

  • Great choice I love mine, it's the most versitile bike I've owned. I've got the titanium GXR and it's currently weighing in at 10.2kg, albeit with Rival and mid-weight wheels. I'd be happy if I got it down to sub 9kg!

    Looking forward to see the complete build!

  • Is this a gravel bike?

  • Gravel is a state of mind

  • It'll be a bit of a pain tbh. You'll struggle to get a disc bike down to that weight, and if you do, you'll be sacrificing a lot of structural integrity.

    I've had a customer throw cash at a carbon tarmac and you can get near, but sweet Jesus it made for a frail bike. Do you really want a frail gravel bike?

  • I'm certainly not going to sacrifice practicality/durability in the name of weight, just trying to keep the weight down as much as possible while being sensible. No super exotic, excruciatingly pricey weight weenie parts that are purely for showroom bikes just carefully chosen light weight parts that are still up to the abuses of riding.
    Most of the weight saving is going to be down to the wheels, I've got a set of 24h lightBicyle carbon rims that I plan on having built with some light weight Newmen hubs. Carbon bars, seatpost and saddle will all help to keep the weight down too.

    Current build is looking like it will come in around 8kg and in the long run I reckon I can get it down much closer to 7kg with a few upgrades. There isn't really any reason for this, I just enjoy trying to build up my bikes as light as possible. I'm not going to lose sleep If my calculations end up being way off and I cant get it down to under 8kg but Im definitely g0ing to try all the same.

  • I'd be very surprised if you could get a Zona disc brake frame down to 7kg but I'll enjoy watching you give it a go. Looks rad

  • Few more bits came this week. I now have most of the drivetrain and a few different size stems to try out. Only thing I'm really missing is a chainring, which frustratingly is going to take about 4 weeks to arrive


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  • nice build but quite true, 7 kg would be proper magic

  • Cool, following this for funs. I did a similar thing recently. 2.05kg 853 frame, enve fork, Force 22 disc group, carbon bars/post/cranks. Hunt gravel wheels and heavy tires. I got 8.7kg bare, 9.1kg rideable with pedals and bottle cages. Wheels and tires are obviously where to start but that only goes so far. 1x makes a difference so you're ahead there. I'm going to switch out the fork for a lighter one but also put a dynamo wheelset on, so I'm not helping things!

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Curve GXR

Posted by Avatar for clockwork_killa @clockwork_killa

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