Finished my first bike build of the Tantan GR201 this week after years of riding an old Pinarello Paris. So far I have logged about 200 kilometers with no issues.
Build process was rather smooth (thanks to the many tips and shared bike builds in the forum!), some difficulties aligning the brake callipers and still some minor brake rub, but should be fine.
Also got a gap of around 3mm between the frame and the fork that seems larger than the gap of other builds. I did not pay attention which bearing to place on top and bottom as I thought they were the same, maybe one is slightly taller which causes the bigger gap? Anyway, don't want to route the cables again so I will leave as is for now.
Running a Shimano GRX 810 1x11 setup with a Magene P515 powermeter and a 46t Riro chainring. The Shimano chain did not really cope well with the narrow wide teeth of the chainring (I think), so I switched to a KMC chain (advised byChatGPT lol). It does feel better, tough not perfect. I don't have any 1x setup with narrow wide teeth as reference but I think narrow wide teeth always have slightly higher resistance, especially at the beginning of the turn (by hand), and run a bit noisier – correct me if I am wrong. So maybe it is just the way it is supposed to be.
For the Magene powermeter I used a 2mm spacer on the drive side, 1mm could also be enough but did not have one at hand. Using no spacer did not work for me because the powermeter base rubbed on the frame or bottom bracket. Unfortunately I already have the M14 screw hole of the non drive side slightly turned through as I installed and uninstalled it 3 times to test the original GRX chainring– Magene offers to send a spare one for 5USD (+ 28USD for shipping!), so maybe ask for a second one right away or be more careful/use better tools than I did.
Have a local event coming up tomorrow with 140km and 1500m in elevation and a big challenge with over 300km and 6000m in elevation next week – will see how the bike and myself perform, especially with the 46t to 40t gear ratio.
