New Brompton Arrived and I rode it!
05-01-18, 06:59 PM
#1
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Join Date: May 2006
Location: SW Colorado
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Bikes: 2019 Gorilla Monsoon, 2013 Surly Krampus, Brompton folder
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New Brompton Arrived and I rode it!
Delivered last night.
Ridden this afternoon!
To be toured on starting the end of May.
Ridden this afternoon!
To be toured on starting the end of May.
05-01-18, 08:47 PM
#3
Senior Member
Congrats! You intend on self-supported (camping) touring? Just curious since you didn't get a rack.
05-02-18, 01:04 AM
#5
Full Member
Fit a 39 tooth chainwheel..26 inch to 83 inch gear range...
05-02-18, 10:32 AM
#8
Senior Member
05-02-18, 10:57 AM
#9
Banned
Wonder if I can swap out the 2 rear cogs for something slightly bigger?
05-02-18, 03:01 PM
#12
Senior Member
05-03-18, 05:34 AM
#15
Senior Member
05-03-18, 06:24 AM
#16
Senior Member
Think I want to try a -22% with the 39T chainring for the 26-78" gi range... Can anyone advise a good 39T ring to buy, and do I need a specific bolt pattern for it?
05-03-18, 06:48 AM
#17
LET'S ROLL
Been using a Shimano Dura Ace 39T chainting for a few years.
Shimano Ultegra chain; both 10 speed. Stock rear sprockets/cogs:
Shimano Ultegra chain; both 10 speed. Stock rear sprockets/cogs:
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05-03-18, 07:39 AM
#18
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Thanks for the compliments everybody!
I should have no problem finding a 130 BCD 40t chainring. But I really wanted to keep the "pants guard" thing.
I should have no problem finding a 130 BCD 40t chainring. But I really wanted to keep the "pants guard" thing.
05-03-18, 08:21 AM
#19
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Interesting. I sure wont be filing the frame. Do you happen to know what brand/spec cogs I would need?
05-03-18, 08:25 AM
#20
**thusi*st
My Velo Pant Guard (Nomadic built, Boulder, CO)
Also, if you are interested, I've modified a Dahon to have a 17 to 96 Gear Inch range. Perhaps some angles like that for your Brompton.
Nice looking bike you have.
05-03-18, 08:32 AM
#21
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I'll send you a Pants Guard if you need. I'm with you generally on wearing pants not tights. This is actually mesh so it is very comfortable to wear.
Also, if you are interested, I've modified a Dahon to have a 17 to 96 Gear Inch range. Perhaps some angles like that for your Brompton.
Nice looking bike you have.
Also, if you are interested, I've modified a Dahon to have a 17 to 96 Gear Inch range. Perhaps some angles like that for your Brompton.
Nice looking bike you have.
05-03-18, 08:48 AM
#22
**thusi*st
and definitely lighter than anything attached with bolts (Local crop too)
I also have some 46 or 42 Tchain ring protectors (I need to count). They can normally work for smaller chain rings too. I've been pulling these from bikes (below) to build the wide range version I mentioned.
05-03-18, 09:38 AM
#23
Senior Member
Been using a Shimano Dura Ace 39T chainting for a few years.
Shimano Ultegra chain; both 10 speed. Stock rear sprockets/cogs:
https://www.youtube.com/watch?v=5AT6...6zPoymgKaIoDLA
Shimano Ultegra chain; both 10 speed. Stock rear sprockets/cogs:
https://www.youtube.com/watch?v=5AT6...6zPoymgKaIoDLA
05-03-18, 09:59 AM
#24
LET'S ROLL
speed ring will behave w/ a stock B'ton chain. I'd go with a 8 or 9 speed ring if you want to stick w/ the stock chain.
2013 Brompton DA chainring Ultegra chain by 1nterceptor, on Flickr
To the Op; and others who want to change rings but still have a protector. I've seen mods where owners put a smaller ring(38T, 39T, 40T);
which were designed to be inner rings. At the same time, they install the outer ring(53T, 52T, etc); but they file the teeth off. Presto, guard.
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05-03-18, 10:06 AM
#25
Banned
A Surly Stainless steel chainring https://surlybikes.com/parts/drivetr...eel_chainrings
would be my go to .. longer wearing , and flat , so you can flip it over & extend it's use-life ( still go 130 39t )
I have had a Surly 110-38t on my Rohloff bike for many years..
'2.1mm thick' so works with 8 speed / 3/32" chain..
But in addition to the Ultegra-Dura ace 130-39t, you can find a lot of others of that size ,
using the same 7075-T6 aluminum alloy to machine into that part..
..
would be my go to .. longer wearing , and flat , so you can flip it over & extend it's use-life ( still go 130 39t )
I have had a Surly 110-38t on my Rohloff bike for many years..
'2.1mm thick' so works with 8 speed / 3/32" chain..
But in addition to the Ultegra-Dura ace 130-39t, you can find a lot of others of that size ,
using the same 7075-T6 aluminum alloy to machine into that part..
..
Last edited by fietsbob; 05-03-18 at 10:18 AM.
