fm028/29 isp topper

Discuss light weight issues concerning road bikes & parts.
Post Reply
brearley
Posts: 354
Joined: Mon Aug 11, 2008 10:08 pm
Location: Hull

by brearley

Looks like I'm getting a dengfu fm029 isp frame soon.
having done a search it seems the isp topper is a bit rubbish. Having looked around the outer diameter of the isp is 37.2mm can anybody tell me which lightweight alternative I can buy or confirm what you have on your dengfu bike?

by Weenie


Valbrona
Posts: 1488
Joined: Fri Oct 28, 2011 3:25 am
Location: United Kingdom of Great Britain and Northern Ireland

by Valbrona

I use one of these frames. The drawing shows 37mm, but I've not measured the top of my seat tube. And ... after lots of looking I have not been able to find a better alternative.

thprice
Posts: 238
Joined: Sun Jul 17, 2011 6:34 am

by thprice

Toppers from 2 manufacturers may be suitable:

5 8 5
Posts: 1353
Joined: Sat Jul 29, 2006 2:36 am
Location: UK

by 5 8 5

Problem is that it's an oddball size.

Re. Woodman, I contacted them last year and they told me that 34.9 was the only size currently available.
Of course that could have now changed.

5 8 5
Posts: 1353
Joined: Sat Jul 29, 2006 2:36 am
Location: UK

by 5 8 5

@brearley
are you sure it's 37.2? It seems to be a strange size.

tinozee
Posts: 701
Joined: Wed Jun 01, 2011 7:53 am

by tinozee

Anyone know if the Ritchey WCS 1-Bolt Mast Topper, 38.35mmx70mm fits this frame? That's the same size as the largest Tune Cappy. Maybe it needs a shim?

User avatar
knef
Posts: 178
Joined: Tue Jan 23, 2007 12:36 am
Location: Belgium

by knef

Any aftermarket ISP toppers need to be shimmed, eg with sheets cut out from cans. Which will increase the chance on seatpost slippage. I kept the original topper because of this. Problem is, it has too much setback for my liking. Grrr

89daytona
Posts: 215
Joined: Sun Aug 29, 2010 12:07 am

by 89daytona

KCNC Majestic
@racecarbrian

JackDaniels
Posts: 108
Joined: Tue Oct 04, 2011 5:15 am

by JackDaniels

If the diameter is the same as the fm015, then you 'can' fit a kcnc, but it requires significant dremmeling. I wouldn't recommend it.

Image

tinozee
Posts: 701
Joined: Wed Jun 01, 2011 7:53 am

by tinozee

Good product to make then and sell to all the FM028/9 owners out there. I ride an s-works tarmac and a ridley helium and I want to try one of these frames after reading all the chinese carbon threads. So curious how it will compare.

brearley
Posts: 354
Joined: Mon Aug 11, 2008 10:08 pm
Location: Hull

by brearley

I should be finding out when my frame will arrive soon then after painting I will see whether the weight saving between the standard and ritchey one is big enough. Setback won't be an issue for me just depends on weight savings.
Buying this as a race bike so I'm hoping its plenty stuff and handles well.

by Weenie


Post Reply
  • Similar Topics
    Replies
    Views
    Last post