oval 7x9 or round carbon rails?

Discuss light weight issues concerning road bikes & parts.
Post Reply
WILLIAMDENYS
Posts: 44
Joined: Fri Aug 24, 2018 5:06 pm

by WILLIAMDENYS

i'm planning on buying a full carbon saddle with carbon rails and can choose between oval and round... i have an s works seatpost and dont know if that fits it?

someone has experience?
- ridley fenix sl 105 - not lightweight
- sworks tarmac sl 5 r8050 di2 - vision tc 24 wheels = 7,1kg

User avatar
VTR1000SP2
Posts: 441
Joined: Tue Nov 05, 2013 8:21 pm

by VTR1000SP2

If you’re light, go for the round and if you’re heavy then the oval


Sent from my iPhone using Tapatalk
42.

by Weenie


Wookski
Posts: 855
Joined: Tue Feb 23, 2016 5:51 am

by Wookski

And if it’s Berk only go oval or you’ll be forever braking saddles- I’m 64kg and onto my 4th. At least Jure honours his warranty!

Jugi
Posts: 166
Joined: Sun Jun 24, 2018 8:10 am

by Jugi

WILLIAMDENYS wrote:
Fri Nov 02, 2018 10:26 pm
i'm planning on buying a full carbon saddle with carbon rails and can choose between oval and round... i have an s works seatpost and dont know if that fits it?
You will be able to get the appropriate saddle cradle parts from a Specialized retailer. Cradle for oval rails is marked as ”Carbon rails” and parts for round rails are un-marked, if I remember correctly.

NiFTY
Posts: 1222
Joined: Sat May 26, 2012 11:26 pm

by NiFTY

Round will have more flex but this can allow them to migrate in the clamps more and obviously the weight limit is lower. 1 have run 2x 7mm berk and 1 7x9mm berk. 71kg. None have broke.
Evo 4.9kg SL3 6.64kg Slice RS 8.89kg viewtopic.php?f=10&t=110579" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;

WILLIAMDENYS
Posts: 44
Joined: Fri Aug 24, 2018 5:06 pm

by WILLIAMDENYS

VTR1000SP2 wrote:
Fri Nov 02, 2018 10:27 pm
If you’re light, go for the round and if you’re heavy then the oval


Sent from my iPhone using Tapatalk
60 kgs so guess im light
- ridley fenix sl 105 - not lightweight
- sworks tarmac sl 5 r8050 di2 - vision tc 24 wheels = 7,1kg

WILLIAMDENYS
Posts: 44
Joined: Fri Aug 24, 2018 5:06 pm

by WILLIAMDENYS

Jugi wrote:
Sat Nov 03, 2018 8:26 am
WILLIAMDENYS wrote:
Fri Nov 02, 2018 10:26 pm
i'm planning on buying a full carbon saddle with carbon rails and can choose between oval and round... i have an s works seatpost and dont know if that fits it?
You will be able to get the appropriate saddle cradle parts from a Specialized retailer. Cradle for oval rails is marked as ”Carbon rails” and parts for round rails are un-marked, if I remember correctly.
i'll have to buy this i think
- ridley fenix sl 105 - not lightweight
- sworks tarmac sl 5 r8050 di2 - vision tc 24 wheels = 7,1kg

arty118
Posts: 5
Joined: Mon Nov 30, 2015 6:55 am

by arty118

I'm not so heavy at 64kg but I managed to break round rail twice! (rode on gravel roads that is very bumpy) Fortunately Berk's warranty is superb and he even changed to oval rail for the replacement. Never break one since then.

User avatar
cerro
Posts: 1418
Joined: Fri May 12, 2006 2:11 pm
Location: Stockholm, Sweden
Contact:

by cerro

As for the seatpost you just need the right clamps. carbon=7x9, alloy=7

I just ordered a Berk Lupina with round rails as I thought free grams with my 60kg :) Specialized clamp as the saddle will be on my Venge.
/jonas l
http://cerrol.wordpress.com (my cyclingblog)

bilwit
Posts: 971
Joined: Sun Apr 03, 2016 5:49 am
Location: Seattle, WA

by bilwit

I'm 61kg and bought round rails thinking "I'm light, it doesn't matter" -- nope, it cracked after a month. Got it exchanged with ovals as well as my second one (unused) on the other bike. Ovals have less flex (and thereby less comfort) but the added assurance is worth way more than a handful of grams. There's a reason why round rails are only special order now and have been taken off the website..

If the turnaround time wasn't so long for me (US <-> Slovenia) AND I only used it in race-day-only situations I might consider round rails again..

User avatar
VTR1000SP2
Posts: 441
Joined: Tue Nov 05, 2013 8:21 pm

by VTR1000SP2

Weird that some lighter guys are breaking these. I'm 67-68kg and have had 3 Berk saddles, none have cracked.
42.

RocketRacing
Posts: 105
Joined: Thu May 10, 2018 2:43 am

by RocketRacing

I am 60kg and broke a round railed carbon saddle (well i heard the odd cracking sound and my 70kg buddy sat on it and i fianlly saw cracks). The 7x9 is still comfortable for me. The round had too much flex.

Interesting point on aluminum posts for round rails. Carbon posts for oval. Kind of defeats the purpose of saving a few grams with round if you need an aluminum mounting system in the post... but maybe it makes sense. :-\

I run a darimo t1 post with full carbon mounting, and berk lupina 7x9... perfect!

by Weenie


Post Reply
  • Similar Topics
    Replies
    Views
    Last post