BB genealogy

Aside from a new name, this little Brompton has undergone lots of changes during its life

• Built September 2011, probably as a S1E

• B11E UK modded with Bullhorn bars & Alfine 11speed IGH & sold to Aussie traveler

• S11E Sydney mods to replace Bullhorn bars, sold to me in December 2012 (name: Ralph)

• S11L mudguards added, various traveling (incl 2013 BWC & 2014 BAC)

• S11R-e GrinTech motor kit added, September 2016 (name: Ralph-e)

• S11E “naturally aspirated” during Sydney lockdown, June 2020

• S4E-X converted during Sydney lockdown #2, August 2021 (name: BB)

• S3E-X wheelset change, September 2021

Some drastic changes but maybe not as insane as they seem?

GrinTech mode was setup after giving up on waiting for Brompton’s e-version release. Very successful mod, although folded weight (23kg with battery) was sometimes awkward. Also, torque-sensing power delivery didn’t mate well with my health issues (“fatigue on big hills meant reduced pedaling effort, resulting in reduced power”; config best set to provide power at low human watts input; later GrinTech motors similar to Brompton version weight)

After my Chpt3 purchase (Rudolph) & finding that I could ride comfortably with an easy-rolling light bike, I removed the GrinTech kit during Covid-time & tried to get Ralph as light as possible & to compare with Rudolph & Clarence (now S4E-X modded). The project almost got to Rudolph’s weight but my conclusion was that the Alfine hub drag was too much for me. (The Alfine IGH was a good range of gears but suffers from increasing hub drag as you change to higher gears. Ralph may cope better with hills but elsewhere Clarence rolls so much more effortlessly.)

Lots of thought on whether I was likely to use (& enjoy) the new Ralph but it seemed inevitable that I ought to let Ralph go to a new home? Another lockdown & I decided to make Ralph enjoyable for me – by doing a Clarence act. So, now I have Clarence & BB (ie Black Brompton, Bitza Brompton, or whatever feels right as a name?) in similar but different configs. Clarence’s spec as a S4E-X now stands at 9kg, with mini rack & standard Brompton lightweight wheelset – sorry Brompton, your newly released P Line doesn’t interest me; too heavy, lower range of gears & “Clarence is already here” – in my favorite colour!

BB’s spec is a S3E-X & has various lighter components to weigh in at 8.3kg. Once again, lighter & a better range of gears (11/14/19T) than a new P Line version – although I’m sure Brompton’s new 4speed shifting is better integrated. (I’d like to say that I’ve given up trying to run BB as a 4speed; lots of tinkering but various factors involved (tensioner distortion, shift cable tension, derailleur clearances, wheelset hub dimensions, etc) but BB’s 3speed runs so well that I’m content – & resisting looking for any expensive bits/kits that may help?)

I suppose I’ll never decide which of my Bromptons is best. They all suit different situations & it’s always a difficult choice for a ride. Clarence & BB are so light & lively that porky Rudolph often gets overlooked?


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