If you’re between sizes the general recommendation is to go down
_smokeymon_ on
I’m 5’11 and ride 53cm (C-C) on the KHS Flite 100 – which is nearly identical geometry
jorimaa on
Are the measurements official from Mercier?
I’m 5’11 and ride 56-58cm bikes. I’ve ridden some 55cm track frames before and the toe overlap is insane. Just seems weird that 55cm is rated for 6’0 + riders.
I am skeptical of these measurements but I would go for 55cm frame size.
JonesBoyFan2018 on
I’m the same height and I had a 53
howard__roark on
I have the 57cm frame and am 6’ and always wish I sized down. The top tube length is long so I had to put a super short stem on it—I have a short torso proportional to my legs. I would size down
ChillinDylan901 on
I would suggest the 53, since it measures 56.
The easiest way to ensure it will fit you is to compare geometry of a know bike that fits you well. I based my Mash sizing off my best fitting bike – which happens to be my smallest, my 54 S5. Without a setback seatpost I ended up ordering a second stem, from 90-110, which will have it within 1/8” and halfway between my gravel bike and the S5 for a seat to handlebar measurement. Everything else matches the S5 perfectly and that was all from comparison of geometry online.
If you don’t have that option, I’d recommend a good bike fit, then you can base your future bikes off of that. I tweak things here and there to get it to my liking, but very subtle changes and only one thing at a time.
DrinkinDoughnuts on
Generally it’s a better idea to size down than up. You can easily correct a little too small bike with saddle height and a longer stem, while it’s very complicated to make a too big bike properly fit you, and even then it won’t feel right.
49thDipper on
53 for sure.
jamessprocket48 on
53. I’m same height and got the 55 and wish I would have got the 53.
NoActivity578 on
I always like my brakeless fixie a little small
jimbroslice_562 on
Depends on your body proportions. I’m around the same height. I have short legs and a long torso, so I have to run a smaller size frame and a long stem. With this geo id go 53cm also.
Ghimbaw on
Stay at 53
Shrugski on
I’m the same height and had the same bike, 53 should fit you.
Mightyhorse82 on
I had a 53 and LOVED it. I’m 6’ and loved how nimble it was. I could throw it all over the place. I have a larger size now and am so much more clunky on it.
I am a bicycle geometry nerd, so please hit me up with more questions!
Colossioni on
As a 5’11 person, get the 55, I’ve ridden too many “53s” to know those head tubes are very small & result in a more agro position, I rock for work a 55cm Sputnik with 56cm tt & still using a 110mm stem
17 Comments
If you’re between sizes the general recommendation is to go down
I’m 5’11 and ride 53cm (C-C) on the KHS Flite 100 – which is nearly identical geometry
Are the measurements official from Mercier?
I’m 5’11 and ride 56-58cm bikes. I’ve ridden some 55cm track frames before and the toe overlap is insane. Just seems weird that 55cm is rated for 6’0 + riders.
I am skeptical of these measurements but I would go for 55cm frame size.
I’m the same height and I had a 53
I have the 57cm frame and am 6’ and always wish I sized down. The top tube length is long so I had to put a super short stem on it—I have a short torso proportional to my legs. I would size down
I would suggest the 53, since it measures 56.
The easiest way to ensure it will fit you is to compare geometry of a know bike that fits you well. I based my Mash sizing off my best fitting bike – which happens to be my smallest, my 54 S5. Without a setback seatpost I ended up ordering a second stem, from 90-110, which will have it within 1/8” and halfway between my gravel bike and the S5 for a seat to handlebar measurement. Everything else matches the S5 perfectly and that was all from comparison of geometry online.
If you don’t have that option, I’d recommend a good bike fit, then you can base your future bikes off of that. I tweak things here and there to get it to my liking, but very subtle changes and only one thing at a time.
Generally it’s a better idea to size down than up. You can easily correct a little too small bike with saddle height and a longer stem, while it’s very complicated to make a too big bike properly fit you, and even then it won’t feel right.
53 for sure.
53. I’m same height and got the 55 and wish I would have got the 53.
I always like my brakeless fixie a little small
Depends on your body proportions. I’m around the same height. I have short legs and a long torso, so I have to run a smaller size frame and a long stem. With this geo id go 53cm also.
Stay at 53
I’m the same height and had the same bike, 53 should fit you.
I had a 53 and LOVED it. I’m 6’ and loved how nimble it was. I could throw it all over the place. I have a larger size now and am so much more clunky on it.
Per the [full geo here](https://bikeinsights.com/bikes/63e50d611be23700203e4b47-mercier-kilo-tt?build=pro&version=2023), they’re pretty long for their stated size. Most of the change between those two sizes is in the reach, so assuming you’re within a deviation or so of standard proportions, the 53 is probably about right.
I am a bicycle geometry nerd, so please hit me up with more questions!
As a 5’11 person, get the 55, I’ve ridden too many “53s” to know those head tubes are very small & result in a more agro position, I rock for work a 55cm Sputnik with 56cm tt & still using a 110mm stem
55cm