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PostPosted: Tue Dec 12, 2017 6:25 pm 
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Joined: Sun Jul 09, 2017 1:30 pm
Posts: 12
Hi,

About 5 months ago, I bought a Cervélo R5 (2015-2017). My height is 1.81-1.82 m and my flexibility is bad, despite this, I am a reasonable cyclist. When I went to buy it I went with the idea of ​​size 54. However, the seller always advised me to go to 56 and did a retul bikefit in that same store that indicated that size. I ended up buying the recommended bike -size 56- with a 100 mm stem and 10 mm spacer; my saddle height is 77 mm (85 inseam) and I use a 0 offset seatpost with the saddle in the middle.
I tend to ride regularly, about 4 times a week both long rides of 100 km with 1500-1700 uphill 26-28 km/h average and short but fast rides (my fastest time in a circuit with 30 km and 320 of uphill alone was 36 km/h with this bike). However, I do not feel perfectly fit on the bike and after reading some things here, I started to think that maybe it would be better to have gone to the 54 with a bigger stem and some spacers. Do you think I should try to change the frame or this size is suitable for my height?


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Posted: Tue Dec 12, 2017 6:25 pm 


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PostPosted: Tue Dec 12, 2017 7:29 pm 
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Joined: Wed Apr 11, 2012 3:40 am
Posts: 752
The only thing getting a 54 would get you is a longer stem, more spacers (yuck) and a lighter wallet. Listen to your fitter and not to people on the internet.


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PostPosted: Tue Dec 12, 2017 9:45 pm 
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Joined: Tue Dec 18, 2012 1:31 am
Posts: 182
Hard to say for sure unless you can explain in what way you feel uncomfortable, but better advice would be to look again at frame geometry. A smaller R5 will reduce both reach and stack, and in fact stack considerably more (-25mm) than reach (-9mm). This won't help you if flexibility is an issue. Maybe you need a more endurance-orientated frame - like an RS or a C5 in Cervelo terms, or something like a Domane. It sounds like you need a shorter reach but the same or more stack. Another thing to look at would be shorter reach bars (say Zipp SL70) to bring the hoods closer in; if you're running a zero-offset post on a frame normally shipped with a 25mm layback, that suggests you're over-stretched. Bringing the saddle forward given your height may have given you less than perfect biodynamics with reference to the pedal circle; you don't mention crank length.

For reference, I ride a 56 Cervelo (I have an R5VWD, R5Ca and S5); I'm 1m86, run a 79cm saddle height with a 175 crank and an 86.5cm (cycling) inseam, 72cm to the hood centreline from the saddle tip (75cm diagonal, 42cm bar), and a 5mm spacer.


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PostPosted: Tue Dec 12, 2017 9:50 pm 
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Joined: Wed Feb 04, 2015 12:48 pm
Posts: 55
I also have a 77cm saddle height with a zero offset post on a 56cm frame with similar geo to an R5.

From what you describe, i wouldn't go 54.

I run 10mm spaces with a 130mm stem (long arms and legs) and i am 177cm tall.


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PostPosted: Tue Dec 12, 2017 10:48 pm 
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Joined: Sun Jul 09, 2017 1:30 pm
Posts: 12
Hello
Thank you all for the answers.
I don't have any pain; my main problem is some instability in front of the bike (probably due the short stem for the size). When I choosed this frame, I looked for the more "relaxed" in those considered "racing"; there were others I also liked - supersix evo and tarmac - however, given the more aggressive geometry I opted for R5. Now I don't not know is if I choosed the right size that makes the best compromise. The components were chosen before buying the bike based on the fit - the handlebar is a 3T Ergosum LTD. I'm training to improve flexibility a little bit because I am still young (24 years old), so in the future it's more likely to put a 110 mm stem and take off the 10 mm spacer, for example, than sustain handlebar drop in the size 54 (or I will always have spacer tower and lots of exposed seatpost)?...I say this because looks also counts and this was the 1st excellent bicycle that I bought and I want to keep it for life. Despite this, n+1 bikes always checked. :D


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