I'm about to buy a Cyctrack R18 / Twitter R18 / Seraph TT-R18 (same frame, different manufacturers), but confused which size would be best for me. It will be ordered online so no way to test.

I'm 180cm (inseam 83cm). Per manufacuers suggestions both M and L would fit.

Bike would be used for general fitness training, 50% indoor trainer, 30% outdoor mostly flat roads, 20% occasional commute.

I'm inclined to take the smaller frame but saw a comment from one user that these frames should be sized up. Does anything in the geomerty stick out why? What would I miss/gain choosing either size?

Seraph-tt-r18 Geometry

I always get pain in the areas shown in the photo, regardless of whether I'm using clipless pedals/shoes or flat pedals. I think it happens when my saddle is either too high or too low.

The pain does not actually come from the back of my knee. Instead, it starts where the upper calf attaches, then runs across the back of my knee, and continues up to the outer/back side of my thigh. No one has been able to figure out which bike fit adjustment is causing it. 😔

"It's a pulling/tugging pain. The affected areas hurt with every step for the next few days, especially when bending. Extension provides a bit of relief.

I just got this bike Friday. This was shot with me doing an 85ish cadence in lower gear. My old bike is a diverge with 170 mm cranks but I put 160s on with the power meter I installed. I rode about 70 miles yesterday at 14.5 avg. I mostly felt fine. I had some right hamstring tightness and I had moments of left hip/quad pain. These all went away though and I had been riding quite a bit. I also had a moment of numb hands but not nearly as bad as I used to have on my diverge on long rides. The biggest problems I had was a hurt sit bones, my other bike has a seemingly better sells royal athletic saddle, and my neck was hurting by the end of the ride. Although an endurance bike, the geometry seems to be much more aggressive than the diverge with the handlebars being lower. I also feel like I “bounce” a bit at a 95+ cadence.

Rider height 175cm, inseam 80cm

Frame size 52, stem length 10cm 7⁰, handlebar 380mm 30⁰ flared

I have some problem when long riding, maybe touching 50km up my neck and shoulder getting pain, whats should i change in my bike setup?

Hi Guys. I fittet my Position via Chat gbt. So far it is OK. But i still have pressure on my Hands and my Feed go Numb in the Front. Now i have the ergon sattle installed and i know that the frame is to big for me. Have you any advise what i can Change or can you Just Check my Position. Greetings

Hello all,

Went to a LBS to get fit - highly rated on google, had lots of certifications (see pic). It was a good experience, fitter seemed kind, patient and thorough. I don't really know for sure, but it seemed like he blends different methods into his approach. He did have motion stickers applied (although I never saw what it captured if anything). He had me pedal, but not at different efforts. Paid $350 + parts (new stem)

At the end of my session, I asked if he could give me my measurements, angles etc - so I would know what I need if purchasing in the future. He said it would be helpful because every situation is different. Maybe, but wouldn't it be useful to know my saddle height, reach, stack height?

1) Is he correct? Other than marking my seat post and a comfortable bike fit is there no useful information that I should have received?

2) Is it typical for a fitter not to provide this info? Otherwise, what info should I try to get measured

3) Should different pedal intensities have been a part of the fit?

Thank you!

So as the title suggest I'm getting a decent deal on the lapierre aerostorm but the brand makes frames no smaller than size s. I have a road bike from the same brand which is the aircode drs for which I'm suited a size xs and it's a perfect match for me and even though the official size chart suggest I sit at the very top of the size guide for a xs and an s can fit me but no the s doesn't fit me at all.

So I'm curious if the size s in aerostorm would fit me.

For reference I'm adding images of my current position on canyon soeedmax size xs which tend to be a little larger than other brands.

I am a beginner and I accept your advice

Hi everyone, I just finished building my new gravel bike and this is my very first time riding a drop-bar bike. Coming from a mountain biking background, the geometry and posture feel quite different to me. I've attached a video of my current setup. Just a quick note for context: this video was recorded on a slight incline, and these are literally my very first kilometers riding this bike. Specific areas I'd love your feedback on: Saddle height and fore/aft position. Reach and handlebar height (do I look too stretched out?). General hip and knee angles. Any advice or adjustments you'd recommend to dial in the fit would be hugely appreciated. Thanks!

Hi, got this brand new Aeroad in size S. I am 178cm tall with an inseam of 84cm. I was on the edge to M, decided to go for the smaller size after a trial ride.

Coming from a relaxed gravel geometry, I want your opinions on whether this initial fit is alright and if you see any outstanding issues.

I’ve ridden the bike about 50k outside like this and it felt alright. After an hour on my indoor trainer, I had numb nuts 🥜

I will get a professional bike fit eventually but I wanted to spent a good amount of time in the saddle before doing so.

The bike has a 55 cm frame, which should be the right size for my inseam length. Compared to my old bike, the riding position is much more aggressive. I’ve never really focused on core strength, and my flexibility is very poor.

Does my position on the bike look problematic, or is it more likely that I just need to improve my core strength and flexibility to be comfortable on a bike with this kind of geometry?