58 to a 56 Cannondale

ollaay

Currently riding a 58cm cannondale supersix at 6'1 and I've just been tempted by a newer supersix in a 56cm, would it be too small?

At the moment running the 58cm with a 110mm stem and with a 34/35 inseam and I have a slightly shorter torso and longer legs. Possibly run it with 130mm stem it'd work and still be comfortable?

Cheers

svetty

As you appear to have long legs relative to your torso a 56 should be fine providing you are reasonably flexible such that the head-tube isn't too short.

ollaay

Svetty wrote:

As you appear to have long legs relative to your torso a 56 should be fine providing you are reasonably flexible such that the head-tube isn't too short.

Ok cheers for that, confusing reading some people my height fit a 56 and some don't.

With a top tube length of 1.4cm less will just mean ill need a stem that much longer than my 110mm right? And seat post will still be what mine is at the moment of 79cm from the BB.

dstev55

Cannondale generally run slightly larger than their mainstream competitors.

At 6ft and with considerably longer legs than I should have for my height I have test ridden a 56 Synapse and it felt spot on. I test rode a 56 Trek Domane and couldn't even get the seat post high enough.

So you should be OK, just watch the drop from saddle to bars, especially if you suffer with back or neck problems.

matt_n-2

Better to compare stack and reach between the two framesets with respect to your current saddle and bar height (ie spacers), there are websites that do this too.

You can easily tweak the effective TT length through a longer stem, but can you cope with the 20mm extra drop the 56's shorter head tube will bring?

ollaay

dstev55 wrote:

Cannondale generally run slightly larger than their mainstream competitors.

At 6ft and with considerably longer legs than I should have for my height I have test ridden a 56 Synapse and it felt spot on. I test rode a 56 Trek Domane and couldn't even get the seat post high enough.

So you should be OK, just watch the drop from saddle to bars, especially if you suffer with back or neck problems.

What's you're inseam being 6ft? Cheers for that

ollaay

Matt_N wrote:

Better to compare stack and reach between the two framesets with respect to your current saddle and bar height (ie spacers), there are websites that do this too.

You can easily tweak the effective TT length through a longer stem, but can you cope with the 20mm extra drop the 56's shorter head tube will bring?

Saddles 79cm from the bb and spacer wise it's near the bottom of the stack. Surely I can just start with the stack higher on the 56 and slowly move my way down. Thanks for the info.

svetty

I have a 56 SS Evo - I'm 6ft but with short legs - BB centre to saddle height of 77cm. I use a 120mm stem.......

dstev55

ollaay wrote:

dstev55 wrote:

Cannondale generally run slightly larger than their mainstream competitors.

At 6ft and with considerably longer legs than I should have for my height I have test ridden a 56 Synapse and it felt spot on. I test rode a 56 Trek Domane and couldn't even get the seat post high enough.

So you should be OK, just watch the drop from saddle to bars, especially if you suffer with back or neck problems.

What's you're inseam being 6ft? Cheers for that

About 88cm if I remember correctly.

Edit - when i say I'm 6ft, I'm actually just shy of 6ft, about 182cm to be more precise.

daniel_b

I'm 5ft 10, and ride a 54 Synapse.
I have the same inside leg as you, well 34", and need a 54 so the reach for me is not too great.
Expect you would be fine.

That also tallies/relates to what dstev55 has found, granted we are on a different model!

Have also ridden a Caad, and 54 was right for me there too.

The first bike I bought based on my height, was a 56 :-(