What's the seatpost offset of your Allez? As the seatpost angle is similar (73.5 for 55" and 74 for 53" Aria while 73.5 for 56" Allez), if you can replicate both relative x and y position of your saddle to BB, that's fine and then look for a suitable stem. 55" Aria and 56" Allez has a similar reach (390 vs 395).win32 wrote: ↑Thu Jun 06, 2019 6:25 pmHi to all!
I'm between sizes for Bainchi Aria and now I need advice what one is better choice.
My hight is 178 cm, my inseam is 82-83 cm.
My old bike was Specialized Allez in size 56" and it was relative ok with 80 mm stem.
I was try Specialized Allez from 2014 in size 54" ant that one was ok.
Now I want to buy Aria but I'm stuck between sizes. I'm little streched on 55". Aria have 2 cm offset on seatpost and with default it have 110 mm stem. Maybe if there is no offset and if I take 90-100 mm stem all that will be better? Did I need to be more streched on Aria than on Specialized Allez? Aero position is great for me and I'm just worried for that streched position with that offset and 110 mm stem.
From some of yours experience, take shorter 90-100 mm stem and try to fix that or to take smaller bike?
Smaller, 53" Arioa have 170 mm crank and I don't know is that ok for my inseam and hight (I never ride with 170 mm)?
The biggest problem of Aria is the stack. How many spacers do you use on your 56" Allez? The stack of 55" Aria is 33mm lower than 56" Allez which means around 3.5 more spacers are needed to replicate the height of your bar (35 * sin72.5 = 33), assuming that the stack of headset top is the same. Meanwhile, effective reach is also reduced by 35 * cos72.5 = 10. Then you can use a 90~100mm stem. Or you can take the angle of stem into consideration to make it more accurate.
The question: is the steerer long enough for the spacers? If not, you have to stay in a more (maybe much more) aero position, which could make you feel more stretched and then switch to a shorter stem. Size 53" can make this problem even worse, as almost no one prefers to be a spacerman on an aerobike.
It's hard to talk about 170 or 172.5 crank. It depands on people, including inseam, strength, riding style...