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Bumped down to £12

Collection in Hackney or Bloomsbury/central

£10 for both (money to world bike relief) 2 x rear panniers one Karrimor with quick clips other more trad

£18 Vaude Newport FS bar bag with Klickfix mount

Thanks for heads up, what do people do for bottles on bromptons? I've already got a front bag but not one with the bottle pouches. The monkii bottle clip looks nice but more than a bit steep for what it is.

Any Brompton insiders know if the explore front bag will be available separately ?

One for the hive mind, saddle position on a Brompton. I see a lot of people ride with it pushed quite far forward. I've set mine as a would my road am I missing something?

That's impressive, how did they get on? I'm guessing you want 6 spd for that

Thank you!

Does anyone have experience taking a pre 2016 Brompton from 3 to 6 speed using the chain tensioner, how simple is this to add to a bike built as an M3L?

On a similar note. A standard marathon has been gouged by some bits of glass with some chunks out the tread. It is less than 6 months old, is that normal? Smaller tyres presumably get hit more often in the same place than larger ones. My commutes is pretty short (60-80km a week). If marathons have that short a life span I'd either swap them to Kojaks or go to the chunkier marathon plus.

Schwalbe Kojaks, anyone used these for commuting in London? They look like a nicer ride but how good is that puncture protection belt.

Cheers, I've seen aluminium ones advertised at 56g but not purchased so no way of verifying that weight

Indeed theoretical, the weights are mainly from your shop. Which ti triangle is that?

? FCB

If anyone else ever wonders what bits give your what weight saving, then thrown various upgrades into a spreadsheet here. TLDR, trying to go sub 10kg with a 3spd hub is hard and expensive!

https://docs.google.com/spreadsheets/d/1daA6yiaQYrJdR5K2MHggiwYY0YHxbpTtustgKy4LWEw/edit?usp=sharing

Top tip. Might lose the guards for the summer.I've already gone light weight on wheels, pedal, saddle. Can a normal brompton seat post lose the pentaclip and is the bb not required?

by my hack maths a standard 3 spd (1.4kg) from 100% ti would be sub 700 g. Even just replacing some of the components could be an easy win, "printed" ti cogs for example. When i get a spare moment I want to make a shared google sheet that gives part, weight, alternate and cost of alternate to see what is most cost efficient thing to swap.

But then you've got the faff of exposed gears and faster wearing parts? If an F1 gearbox can be titanium why not a hub?

It also has no pedals! But the more I carry mine around the more I want to shave a kilo off it. So wonder what part of it could be designed lighter, the 3 speed hub seems a good candidate to trim some weight from. Brompton have a decent enough customer base to warrant getting more of their bits custom made, what about higher spec lightweight steel? Seems to be making a come back in road bikes. My roadie is also aluminium (CAAD) and the most comfy bike I've owned, I appreciate that is as much to do with geom and carbon forks but it feels like Brompton are missing a market opportunity. The Austin ATTO is a nice idea with a terrible fold but shows what can be done.

Hmm, I always wondered what a full ti Brompton would weight in at and why Brompton don't offer this. Via another forum > Full ti 5.84kg and i theory I can buy this (illegal) frame on ebay. Anyone care to confess to having brought one and share how it is? The OP on that thread queries how flexy it would be to ride. I'm also curious as to why no aluminium I'm sure there are good technical reasons for both.

Separate topic, has anyone fitted a sherlock bike gps tracker to their Brompton. It goes inside handle bars and is described as snug fit on a road bike, potentially it could go in the seatpost tube or in frame though they recommend handle bar for best signal. I'm surpirsed Brompton aren't marketing a rip off premium equivalent that fits snuggly in the fold..

nice, these partly answer my could you build a bigger bromtpon question. Where a bigger Brompton is same fold but with with a larger wheel and the benefits that brings. My reason for owning a brompton was lack of secure storage for n+1 and a friend selling his old one if the size crept up a bit it wouldn't be an issue as I'm not commuting it on train etc but nice to have that option when heading out of town due to our stupid bikes on train policy in UK. It looks like I can hack a best of both situation. How does the ride and handling compare to 16" @amey

Brilliant, thank you.

Thanks @amey and @JurekB . A useful post here for reference on going down a shimano route
https://handsonbike.blogspot.com/2017/08/brompton-m6r-shimano-crankset-and.html But seems like a decision between stiffer cranks or lighter build but you can't have both

It’s lighter but not a like for like comparison, as you’ll either need an adaptor or have to use different crankset. If someone’s gone this route and it works then keen to know. My commute involves 5 flights of stairs each way so the grams add up

Either new type spider one or original with plenty of life left in it