Does anyone use Ridenow inner tubes with metal valves https://it.aliexpress.com/item/1005007306513500.html?
How do you find them, any issue?

well, the parts order is pretty easy, upper earing then c-ring and then spacers. if you have the Spcycle handlebar mind that the top cap isn't flat (it’s conical) and you need the steering tube being at least 4 or 5mm below the handlebar level. I believe this is your issue on may be the c-ring not fitted properly. I say that just bacause I actually had to cut my fork tube twice, because I ended up a couple of millimeters too long at the first attempt.

Hey everyone, long time lurker, first time posting. I’ve been between this R088 frame and a Tantan x68 for awhile now for my first Chinese carbon build. I was about to pull the trigger on the R088 from ali express because there’s a good sale going on right now that brings the cost to right around $600 shipped (about $200 less than the x68). Unit I saw the latest video from GCNTech with the dude who built up the R088 and shows a crazy amount of front end flex. He’s using a toseek integrated handlebar and to me it looks like a lot of the flex is just in the handlebar, but it’s hard to tell. I’m hoping if anyone who’s built up a

Quote from: benquick on February 01, 2026, 05:04:59 PM

A few pages back some people were concerned about exactly the same thing. While I can't say for sure how noodly the frame is while riding outside, I am pretty confident that the flex shown in the video looked exaggerated, probably, as you mentioned, due to a lot of flex in the handlebars. I have done a similar test on my SP-R088 with HBR17 handlebars, and it doesn't look worrying to me at all (and definitely not as pronounced). Another person made a video a while back which also showed minimal flex.

There was also some top tube flex reported at the beginning of the thread; I am experiencing none of it. When I squeeze the seat stays, however, they appear more flexible with SP-R088 than on my other carbon bike (Velobuild VB-R-177).

I will report once I ride the bike outside, but inside, on the trainer, the frame itself has appeared solid.

Just check my frame and there’s nothing like the flex he was getting. GCN is sponsored by the ‘mainstream brands’ that builds like this undercut (Orbea & Pinerello etc). It appears the whole project is a scaremongering effort! What do others think that have completed builds and are riding their R088s?

I would be curious to see the headset arrived with the new 56 frame....could you take some photos?
Thank you!

179cm and 54 is too small? I have 179cm too and 54 size is okay.