Got a retul fit, which trek frame size might suit me best?

[weebeansysbro]

Hi all, got a retul fit done (for piece of mind more than anything) before buying and the numbers from this are in the table below along with the geometries of the Trek Domane AL 2 disc. Would like peoples opinions on what frame size might work best for me? I'm 5'11 with a 34 inseam. Thanks!

 

[Cycleops]

The 58 for sure.

 

[vickster]

@Paul_Smith SRCC might be able to advise

but shouldn’t the fitter be making a recommendation based on his expertise…isn’t that the point of having a jig fit? Otherwise you’ve paid a lot of money for some numbers which you can’t use?

 

[Venod]

What stem length did you have on your frame fit?
I would go with the 56
I am 5'10" with a 33" crotch to floor and depending on the geometry, I ride a 54 or a 56.

 

[Ming the Merciless]

What did the retul guy advise?

 

[weebeansysbro]

@Paul_Smith SRCC might be able to advise

but shouldn’t the fitter be making a recommendation based on his expertise…isn’t that the point of having a jig fit? Otherwise you’ve paid a lot of money for some numbers which you can’t use?

He said either could work but was leaning towards the 56. No harm in getting a second opinion

 

[weebeansysbro]

What did the retul guy advise?

He was leaning towards the 56, but said either could be made to work. Thought I'd get a second opinion

 

[si_c]

I'd go 56, you can always fit a longer stem if needed to add reach, the other markers are closer on the 56 than the 58.

 

[Paul_Smith SRCC]

Hi all, got a retul fit done (for piece of mind more than anything) before buying and the numbers from this are in the table below along with the geometries of the Trek Domane AL 2 disc. Would like peoples opinions on what frame size might work best for me? I'm 5'11 with a 34 inseam. Thanks!

View attachment 600465

I'm very close to your dimensions and I'd personally be focusing more on the 56cm Trek Domane AL2. For sure even though I am similar there are other considerations, shoe size, flexibility, range of motion and stability to name just some of the factors a bike fitter will take into consideration.

 

[weebeansysbro]

I'm very close to your dimensions and I'd be focusing more on the 56cm. For sure even though I am similar there are other considerations. As well as the data shown did they advise your saddle height? View attachment 600551

cheers Paul. Yeah they said 776mm from bb to centre of saddle, which it seems the 56 can accommodate with around 50mm seat post left.

 

[si_c]

cheers Paul. Yeah they said 776mm from bb to centre of saddle, which it seems the 56 can accommodate with around 50mm seat post left.

Even then you could always get a longer seat post, I rode a 61cm frame with a longer stem and taller seatpost for a couple of years, and it was a seriously comfortable fit - for reference my Domane is a 62cm frame with a longer stem and my Kinesis 63cm.

Edit to add: It's always better to get a slightly smaller frame if unsure, you can't as easily correct a reach that's too long. It's probably a poor comparison but the pro cyclists seem to get smaller frames and longer stems routinely as it's a more aerodynamic setup, particularly with TT frames.

 

[fair weather cyclist]

56 or 58, either will work. Not going to make much difference

 

[Paul_Smith SRCC]

56 or 58, either will work. Not going to make much difference

That's the advantage of an Endurance bike like the Domane, by design they are quite 'bike fit' friendly.

56cm

58cm​

Morphing the 56cm to the 58cm

I have used the same saddle height and setback on all the above with 30mm headset spacers. Due to the higher stack of the 58cm the reach from saddle tip to bars is only 2mm more. The drop to the bars on the 58cm is quite conservative, with such a minimal drop most would remove spacers to lower it on this kind of bike; I've done that on the drawing below for you.

​

For sure to a new rider listing the bar drop on the 56cm to the top of the bars as 51mm maybe just a number with little useful meaning, that's where the bike fitter will be able to help as they can set the jig up so you can feel what that number relates to. Put into context without a fitting, that drop to the bars is normally doable for someone of our height and dimensions on this style of bike if they have average flexibility. Using myself as a reference I cope with a larger drop of 63mm on my Van Nicholas Chinook, I have an arthritic back and very short hamstrings and literally don't get past me knees when attempting a toe touch; as you can see below I do not have an aggressive position.

​

 

[weebeansysbro]

That's the advantage of an Endurance bike like the Domane, by design they are quite 'bike fit' friendly.

View attachment 601032 56cm​

View attachment 601015 58cm​

Morphing the 56cm to the 58cm
View attachment 601016​

I have used the same saddle height and setback on all the above with 30mm headset spacers. Due to the higher stack of the 58cm the reach from saddle tip to bars is only 2mm more. The drop to the bars on the 58cm is quite conservative, with such a minimal drop most would remove spacers to lower it on this kind of bike; I've done that on the drawing below for you.

View attachment 601033​

For sure to a new rider listing the bar drop on the 56cm to the top of the bars as 51mm maybe just a number with little useful meaning, that's where the bike fitter will be able to help as they can set the jig up so you can feel what that number relates to. Put into context without a fitting, that drop to the bars is normally doable for someone of our height and dimensions on this style of bike if they have average flexibility. Using myself as a reference I cope with a larger drop of 63mm on my Van Nicholas Chinook, I have an arthritic back and very short hamstrings and literally don't get past me knees when attempting a toe touch; as you can see below I do not have an aggressive position.

View attachment 601040​

brilliant stuff paul I have all the info i need now