Originally Posted by eaglesandcycling (Post 22915927)

I've been riding a 56cm Trek Checkpoint ALR5 for 5 years now and ready to upgrade. I'm a guy who's 6foot (183cm) tall and has an inseam of 80cm. I'm looking to buy a few different brands but they have this sizing system of S,M,L, etc. I'm right in between a M and a L for the bikes/brands I'm looking into. Just not sure which size to buy; and I'm gonna spend a shxtload, around 5 grand on a new bike. Is a M gonna be too small for me? Well, I guess this totally depends on which brand I end up buying. Hmm

BTW, i will get fitted to this new bike as I did for my Trek years ago.

Originally Posted by Eric F (Post 22915965)

I'm 5'-9" and ride a 53-54. In S/M/L designations, I'm pretty consistently a M. My best guess is that L will probably be the best size for you, but with the amount of money you're spending taking the step to get properly fitted is a good plan.

Originally Posted by Koyote (Post 22915958)

Then let the shop help you figure out which size to buy.

Where's the problem?

Originally Posted by eaglesandcycling (Post 22915927)

I've been riding a 56cm Trek Checkpoint ALR5 for 5 years now and ready to upgrade. I'm a guy who's 6foot (183cm) tall and has an inseam of 80cm. I'm looking to buy a few different brands but they have this sizing system of S,M,L, etc. I'm right in between a M and a L for the bikes/brands I'm looking into. Just not sure which size to buy; and I'm gonna spend a shxtload, around 5 grand on a new bike. Is a M gonna be too small for me? Well, I guess this totally depends on which brand I end up buying. Hmm

BTW, i will get fitted to this new bike as I did for my Trek years ago.

Originally Posted by eaglesandcycling (Post 22916097)

I plan to buy one of these bikes online here in Europe. Will be shipped to me..

Originally Posted by SoSmellyAir (Post 22916274)

First, is that your pants inseam or your actual cycling inseam? I am guessing the former?

When I bought my gravel bike, I found this explanation by Santa Cruz very helpful:

Body Dimension

Not all bodies at a given height are the same. If you have longer legs and a shorter torso than the average person your height, that may push you towards the smaller of the recommended sizes. If you're all torso and arms, most likely you'll want to size up.
​​​​​​
Lastly, the height-based size guide is just an approximation. You do not need that as you already have a bike which you have ridden for 5 years. Does it fit you reasonably well? If yes, you can start by comparing the respective geometry numbers of your existing bike and your target bike. Then you can also consider, for example: (1) how your fit has evolved over the course of the 5 years riding your existing bike; (2) existing cockpit setup, e.g., stem length and angle, headset spacers needed, seat post setback, saddle rail clamping spot, etc.; and (3) whether you would like to go a bit lower, higher, more or less stretched out, etc.

Originally Posted by eaglesandcycling (Post 22916410)

that figure is my cycling inseam...

Originally Posted by eaglesandcycling (Post 22916410)

thanks for all of the input here, helpful!

Originally Posted by SoSmellyAir (Post 22916419)

Hmm ... an 80 cm inseam seems kind of short for someone who is 6 feet tall. The advice from Santa Cruz would suggest that you take the larger of the two sizes you are in between.



Good luck shopping. Which gravel bikes are you looking at?

Originally Posted by eaglesandcycling (Post 22916423)

Lauf and Pearson..

Originally Posted by Koyote (Post 22916520)

I have not heard of Pearson… But at least here in the US, the Lauf gravel bike options are absolutely screaming deals. The prices are extremely reasonable for the quality and build kits. And again – here in the US at least — the return privilege should pretty much eliminate any worries you have about sizing.

Originally Posted by eaglesandcycling (Post 22916423)

Lauf and Pearson..

Originally Posted by SoSmellyAir (Post 22919108)

The 2019 model year is the earliest Trek Checkpoint ALR5 in Trek's archives: Checkpoint ALR 5 - Trek Bikes

The Lauf Seigla frame has a lower stack:reach ratio, and is longer and lower.

Originally Posted by eaglesandcycling (Post 22919180)

hmm. guess i messed up the year, you're right.

Originally Posted by eaglesandcycling (Post 22919180)

so if my 56cm Trek fits me well I guess i should go with a Lauf Seigla Large, yah? then get a bike fit..

Originally Posted by SoSmellyAir (Post 22919194)

No. The 2019 model year would have been released in 2018, so if you had bought it new, then you would have ridden it for about 5 years.



Not necessarily. You have to (1) compare the geometry numbers between the two bikes, especially stack, reach, and effective top tube; (2) evaluate how your current bike is setup, e.g., seat post setback, stem length and angle, spacers under stem, etc.; and (3) consider whether your torso can go lower and longer and your arms can reach lower and further. Although the components under #2 can be changed (e.g., during a bike fit) to compensate for the lower stack:reach ratio of the Seigla and to arrive at close to the same fit between the two bikes (e.g., shorter stem, higher stem angle, more spacers under stem), the result could be ugly and might affect handling.

Originally Posted by eaglesandcycling (Post 22919209)

i really appreciate all of your feedback and help here.. im a total dumbass in all honesty with all of this fitting/sizing ****. and i really dont care to take the time to learn, in all honesty; i just LOVE riding simply.. but i guess i need to take some time to learn at least some of this.

Originally Posted by eaglesandcycling (Post 22919209)

i really appreciate all of your feedback and help here.. im a total dumbass in all honesty with all of this fitting/sizing ****. and i really dont care to take the time to learn, in all honesty; i just LOVE riding simply.. but i guess i need to take some time to learn at least some of this..

thoughts on these 2 comparisons?:
https://geometrygeeks.bike/compare/l...-5-2018-56-cm/

https://geometrygeeks.bike/compare/t...a-2022-medium/

Originally Posted by eaglesandcycling (Post 22919209)

i really appreciate all of your feedback and help here.. im a total dumbass in all honesty with all of this fitting/sizing ****. and i really dont care to take the time to learn, in all honesty; i just LOVE riding simply.. but i guess i need to take some time to learn at least some of this..