I have no clue how to use this site but have a question. My big block is a 56, even at 5'11" its too big for me. There is a 54 mark v on offerup I'm looking at buying so I've been reading all these forums trying to figure out how I'm gonna fit on this frame. Until I figure this thread forum thing out I was hoping you could forward this to somebody who may know..? Thanks dude

Why not go try it out and see if it fits? I'm 5'9ish and ride a 53 for the most part, so a 54 might fit you. But you could have short legs and a long torso or vice versa. Take your measurements, look at a geo chart for each and compare where your current bike isn't fitting you, to the IRO's geo. But you could try making the All City fit you better first with a shorter stem and things like that. But if you don't want to measure yourself just go ride it and adjust it if needed.

https://www.competitivecyclist.com/S...ulatorBike.jsp

Well, I'm not sure you'll even be able to find your way back here. But I'd wager >90% of all guys 5'11" tall would ride a 56 or 58cm frame... are you somebody who like to flat foot both feet from the saddle at stop lights?

Considering All-City never made a 56cm Big Block, I'm willing to bet yours is a 55.

I'm 5'10" and have long arms but would size down to a 52cm Big Block based on the long top tube measurement on their frames. I rode a 55cm Thunderdome (which has very similar geo) and it was a touch too big.

Kilo TT

I hope I also did this right and thru the magical interweb this gets back to you, thanks for replying first off and I can put both feet flat on the ground without crushing my nuts on the top tube but feel like as far as a track bike geometry its to big for how hard I wanna go ya know? If it was a geared bike I think it'd be cool, but its not.. I don't wanna buy a frame because someone wants to get rid of it not caring whether it fits me or not but don't really have a choice because I don't have yuppy ass bike shop money.. Everything I built this bike with is super nice, I just don't wanna have to learn by trial and error anymore than I have already since I got into it. Thanks dude

Yea 55 my bad, I know the thunderdome is really similar so I'm glad you hit me back. Standing my feet are flat on the ground it just seems like too much bike and I don't have the control I want. Everything on my bike is super nice and will use on this new frame so I need to figure out how much smaller a 54 from iro will be, if any..? Thanks for getting back to me. Oh yea its on offer up that's why I'm asking, there is also a 54 Traitor Ringleader I'm looking at too. If you know anything about how it stacks up that'd be Kew. Thanks again

Not necessarily. I'm two inches taller than that and usually opt for a 57-58.

Regardless of the manufacturer's labeled size, top tube length is the most important measurement in bike sizing. Get that right an everything else will fall in line.

Also, you want your bike to fit when you are riding it, not when you are standing over it.

Hi N BDWY,

I moved your posts and its replies out of that 7 year old thread and into its very own new subject thread!

If you would like to create other discussion topics/ subjects, please click the blue-pill shaped "Create thread" button at the upper top-left hand corner of the SS/FG subforum mainpage.

Thanks!

I bought the mark v and the fork has too much rake. It's a threaded headset so I'm looking for a fork I'll like. Ive been looking but don't know how really. Help if you can pretty please