Brompton Double Wall Rims
#1
Good Ship Ruffles
Thread Starter
Join Date: Jul 2010
Location: UK
Posts: 31
Bikes: Brompton!
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Brompton Double Wall Rims
Hi,
Looks like I'll need to replace my Brompton rear rim again soon. So I looked on the SJS site to order the bits.
However the site now describes them as "Brompton 16 x 1 3/8 (349) Angle Drilled Double Wall Rim - 28H" https://www.sjscycles.co.uk/brompton-...28h-prod31190/
I don't remember the old rims being double walled. Have they changed them? Seems to me that if they're now getting the rigidity out of tubular construction they will be thinner and wear out quicker?
Anyone rebuilt a Brompton wheel recently?
Looks like I'll need to replace my Brompton rear rim again soon. So I looked on the SJS site to order the bits.
However the site now describes them as "Brompton 16 x 1 3/8 (349) Angle Drilled Double Wall Rim - 28H" https://www.sjscycles.co.uk/brompton-...28h-prod31190/
I don't remember the old rims being double walled. Have they changed them? Seems to me that if they're now getting the rigidity out of tubular construction they will be thinner and wear out quicker?
Anyone rebuilt a Brompton wheel recently?
#2
Senior Member
Join Date: Sep 2013
Location: Wales
Posts: 124
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
I don't have a Brompton, but on my small wheelers 16"- 20" I have double rims and one set of cheap single rims.
In general terms the double rims are stronger.
I've used BMX Alienation Ankle Biter rims for rebuilding 20" x 1 3/8 "wheels, very good rims if you can find them at the correct size and discounted. Got mine from customriders who sell bmx bikes and parts.
I expect you'll need new spokes too?
Beic
In general terms the double rims are stronger.
I've used BMX Alienation Ankle Biter rims for rebuilding 20" x 1 3/8 "wheels, very good rims if you can find them at the correct size and discounted. Got mine from customriders who sell bmx bikes and parts.
I expect you'll need new spokes too?
Beic
Last edited by Beic; 02-18-14 at 11:15 AM.
#4
Banned
Have they changed them?
Note to Belc 349 ETRO, is a larger rim smaller high pressure tire, 16" rim. smaller than 406 20" rims..
just replaced the spoke or 2, on my old Mk2
then recently swapped out single wall front wheels , 2nd one with a shimano dynohub..
the single wall rim same front and back ..
New spec. the rim is different rear & front.
As you are changing from 1 rim to another, without , likely, not needing different spokes
tape the new rim to the old one and move the spokes over 1 by 1... still attached to the hub..
Last edited by fietsbob; 02-18-14 at 11:39 AM.
#5
Good Ship Ruffles
Thread Starter
Join Date: Jul 2010
Location: UK
Posts: 31
Bikes: Brompton!
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Ok. Looks like this upgrade is not optional which is fair enough. Interesting to see if it lasts as long. Shame as I was planning on reusing the spokes this time. Last 3 rebuilds I've always bought new ones. Still on the original hub.
By the way I replaced the chainwheel/crank unit a couple of months ago. I asked about the new spider+chainring I could see on the new bikes but it seems that not all models use them. Is this true or was I looking at old stock? Logically it should be cheaper to replace the ring - and I can move it round to even out wear. The original chainring was completely out of shape. I estimate I should be replacing it every 12 to 18 months.
By the way I replaced the chainwheel/crank unit a couple of months ago. I asked about the new spider+chainring I could see on the new bikes but it seems that not all models use them. Is this true or was I looking at old stock? Logically it should be cheaper to replace the ring - and I can move it round to even out wear. The original chainring was completely out of shape. I estimate I should be replacing it every 12 to 18 months.
#6
Senior Member
Join Date: May 2005
Location: Albany, WA
Posts: 7,393
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 321 Post(s)
Likes: 0
Liked 7 Times
in
6 Posts
If you don't believe me, check Sheldon Brown.
#7
Banned
Ok. Looks like this upgrade is not optional which is fair enough. Interesting to see if it lasts as long. Shame as I was planning on reusing the spokes this time.
are you assuming or did you already talk to the Dealer ?
Brompton is all about retro compatibility , ask at the company , they respond to individual emails ..
I got a warrantee left pedal direct from them.
as to the spider crank , you may be able to use another 130 bcd road crank .
There is the option of Surly's Stainless steel chainrings up to 50t. very long wearing.
Last edited by fietsbob; 02-18-14 at 01:22 PM.
#8
Good Ship Ruffles
Thread Starter
Join Date: Jul 2010
Location: UK
Posts: 31
Bikes: Brompton!
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
I got the new ring/crank from the dealer I got the bike from for that very reason. When asked he reckoned just the ring on the new set would be a similar price. And I was in a hurry so I didn't pursue it! I really need to buy spares before I need them. But it gets rather expensive.
That's interesting. I've replaced many chains as well due to stretch. I reckon a lot of that is down to a worn chainring. So could save money all round!
That's interesting. I've replaced many chains as well due to stretch. I reckon a lot of that is down to a worn chainring. So could save money all round!
#9
Banned
I use a Surly SS 38t/110bcd on my R'off IGH (26" wheel) .. bike..
Note: I find, older full bushing type chain is a bit longer wearing , than the 5,6,7,8 speed derailleur chain s ..
which are bushing-less (actually a flange is made of the steel punched out of the hole, roller edge rides on that)
Note: I find, older full bushing type chain is a bit longer wearing , than the 5,6,7,8 speed derailleur chain s ..
which are bushing-less (actually a flange is made of the steel punched out of the hole, roller edge rides on that)
#10
Good Ship Ruffles
Thread Starter
Join Date: Jul 2010
Location: UK
Posts: 31
Bikes: Brompton!
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Just to close off this thread.
+ The old rims are still available. Got one from "On Your Bike".
- Looked at a new rim. They're worryingly light!
+ Can now change a rim in an hour while watching TV.
- Now on fifth rim in four years
Oh and just noticed the front bearing has gone. Hope it just needs cones and bearings!
+ The old rims are still available. Got one from "On Your Bike".
- Looked at a new rim. They're worryingly light!
+ Can now change a rim in an hour while watching TV.
- Now on fifth rim in four years
Oh and just noticed the front bearing has gone. Hope it just needs cones and bearings!