Going all-in with Chinese tech: Tantan road frame, Ltwoo electronic shifting, Nextie wavy rims

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Miller
Posts: 2833
Joined: Thu Sep 21, 2006 8:54 pm
Location: Reading, UK

by Miller

I had a concept for a modern general purpose bike, all road capable, and since I have enjoyed my gravel bike based on a Tantan GR039 frame, I stuck with Tantan and selected their TT-X37 frame. It comes complete with seatpost and integrated bars. For wheel rims I went with Nextie as I really rate their products. What to do about components? For a notably budget build even the current offerings from Sram/Shim are not exactly cheap. However, Ltwoo is cheap, I had already dipped a toe into their product line with some low end mech shifters and liked what I found so I took the plunge and ordered their ER9 semi-wireless groupset. This is wireless at the shifters then there's a battery holder inside the seatpost with wires to the mechs.

You could say the bike is a Chinese technology extravaganza. I have slightly mixed feelings about that but on the other hand I enjoy the experimentation that is possible when the outlay isn't so painful. It's fun escaping the hegemony of the manufacturers we know oh so well. As pictured here the bike has cost me £2,000. It weighs 7.85kg albeit still lacking a couple of accessories.

This build was only completed on Friday when a ride round the block revealed no obvious issues. Still it was rash for the first proper ride yesterday to be a 190km jaunt down to Portsmouth and back. It was not entirely hassle-free, the seatpost clamp design is a strange one and I had to stop a few times early on to torque it as high as I dared until it settled down. But other than that it was an excellent experience, the Ltwoo shifting impressed, the brakes bedded in, and I was able enjoy the ride without worrying about the bike. Just me, cos I don't do that distance very often.

The paint is a custom colour, Pantone 7711c, with my logo on the down tube.
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The RIRO chainset is a recommendation from a friend for something decent out of AliExpress.
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ER9 front mech is functional rather than elegant but does the job
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ER9 rear mech delivers fast precise shifting. 12 speed here but can be programmed for other gear counts. Try that with the main suppliers.
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GP5000s TR tyres in 32mm width, Lezyne valve
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Aliante saddle in a slotted version held in place by the unconvincing clamp. The seatpost is not actually round, it's squared off at the rear so not easy to swap in something else.
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The shifter levers with their noticeable kick outwards. Frame tyre clearance is given as 35mm but it will take more, up to 40mm perhaps.
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RH shifter. The Ltwoo shifters are a lot slimmer than the Campag shifters I'm used to. They seem nicely made. Could do with better access to the shifter tightening bolt though.
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Rear dropout and caliper, TRP rotor
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Front caliper. Ltwoo supply adaptors to cope with the various possible combinations of front/back 160/140 rotors. Clunky but keeps their SKU count down?
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Front wheel, Nextie NXT40CRX-AW wavy rim built onto a Bitex hub with Sapim D-Light spokes
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Integrated bars, went with the trend and selected 38cm width, the narrowest available with this frame. They're nice.
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First impressions are of a silent efficient ride. Climbs very well. The geo is not stretched out. On a longer ride I often get lower back pain but very little of that on yesterday's ride.
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raisinberry777
Posts: 380
Joined: Wed Jul 30, 2014 1:09 am

by raisinberry777

Nice one! I hope the L-Twoo gear holds up for you. I'm considering EGR for a gravel build but will wait until there's some more long-term users out there.

by Weenie


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mike
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Joined: Tue Mar 18, 2003 9:42 pm

by mike

looks like a great bike. please let us know how everything rides and shifts. also interested in the crank as well

BernieMoves
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Location: Austria | Slovenia
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by BernieMoves

The front wheel looks off center in the fork. :-O

Greeners
Posts: 57
Joined: Fri Apr 26, 2024 10:13 am

by Greeners

I'm liking your approach. You can't deny that's a hell of a bike in todays market, at that price.
Keep us updated.
Any thoughts on the fr wheel being off-centre?

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Miller
Posts: 2833
Joined: Thu Sep 21, 2006 8:54 pm
Location: Reading, UK

by Miller

Well, yes, it's a lot of bike for the money and the price of current mainstream bikes is quite the topic.

I'll do a video review at some point fairly soon when I have more experience with the bike.

I eyeballed the front wheel alignment this morning as I left for work. If it's off centre it's less than 1mm, easy fix anyway.

olivia101
Posts: 2
Joined: Sat Jul 27, 2024 8:26 am

by olivia101

Your bike concept sounds fantastic! It's great to hear you've had a positive experience with Nextie rims

jayjay
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Joined: Thu Jul 22, 2021 8:07 am
Location: Germany
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by jayjay

Miller wrote:
Sun Jun 23, 2024 12:54 pm
GP5000s TR tyres in 32mm width, Lezyne valve
Image
What finish did you choose for the rims? Free Coating or Matte?
And what is the WAM of the tires?

warthog101
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Joined: Wed Sep 25, 2013 10:05 am

by warthog101

Great job. I am money conscious too with respect to bikes and that looks like good value.

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Miller
Posts: 2833
Joined: Thu Sep 21, 2006 8:54 pm
Location: Reading, UK

by Miller

@Jayjay: I chose free coating. Nextie gave me some info about this: "As for the free coating, it means no sanding or finish coating process conducted on rim surface.
Not a Glossy finish. The free-coating finish rims are unable to be applied with decals." They think it's a good thing, more info on their site.
As for WAM, I'm away from home on family hols at the moment, will measure later. I'm getting to do some cycling in the Vosges in the Alsace region of France which is absolutely fantastic.

@Warthog: it is, and I love riding it, haven't really touched another bike since I built it.

by Weenie


Visit starbike.com Online Retailer for HighEnd cycling components
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User avatar
Miller
Posts: 2833
Joined: Thu Sep 21, 2006 8:54 pm
Location: Reading, UK

by Miller

I've been riding my new bike in the Vosges mountains. As a location, strong recommend.


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