Same here, only from authorized dealers.
M to H conversion
- Thread starter CEBEP
- Start date
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Same here, only from authorized dealers.
Kell
Veteran
- Location
- High Wycombe/London
This is why it’s good to get lots of opinions.
Completely forgot to mention the folding hinge on the H stem.
Completely forgot to mention the folding hinge on the H stem.
Schwinnsta
Senior Member
- Location
- New Orleans, LA USA
Actually it goes on like a normal quil stem. You can use the stem catch to do the alignment. It can be accomplished by mere mortals.
rogerzilla
Legendary Member
I was being sarcastic. Brompton do it to give their dealers work.
berlinonaut
Veteran
- Location
- Berlin Germany
The H stem before 2017 is ~2cm lower than the one after 2017 and same goes for the M-stem. All of those stems will fit any Brompton since 1991. With the newer M-Stem from your bike you will need the new handlebars as well. As @Kell showed earlier in this thread the older bars were slightly higher and will not play well with the newer stem in terms of folding. Newer bars with older stems on the other hand are no problem. If you swap your stem to the older H-stem including the older H-bars you will have a tough job fitting the newer shifters (also from 2017 on) onto the old bars - it works, but very tight and only in more or less one single position. I'd recommend getting the newer bars onto the old stem (which in your case would mean buying a replacement bar, as after the swap with the other guy both stems would do best with the newer bars).
ExBrit
Über Member
- Location
- Southern California
I have two of these that I'm not using. They provide a 4cm rise and they do work with M bars. They are your cheapest option. They don't lift the bars as far as the H bars but maybe they will be good enough. You will, however, lose a little bit of bar space for mounting computers etc. You don't need to replace any cables and, if you simply raise the handlebars with them, they don't affect the fold. If you use them to push the handlebars forward, they will quickly affect the fold. Now you just need to find a way to get one. Hope this helps.
Update: They are called Satori Aberhallo and they can also be found on AliExpress and other places.
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Thanks for the feedback. Unfortunately I don't have even 4cm clearance between my handlebar edge to the ground when folded, so unless I'll get an H stem, unfortunately there is no room to extend.
ExBrit
Über Member
- Location
- Southern California
That's a shame. I was able to fold with them (just).
I asked my local dealer to quote and he said it will be so expensive that I should simply forget it
I should probably keep using my M bar and see how it will go. BTW do you have any experience with Matumura Kohki Scrowave Suspension Spring? Based on reviews it seems to provide better suspension compared to stock brick.
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It is a shame. I was really hoping it will work out.
I have Brooks Ergo handlebars which are a bit longer than stock adding to the width. Plus I have a handbag mirror on the left handle, brining it even closer to the ground when folded. And I can't shorten the bar as breakes already push to the internal bend of the handlebar. And this is considering that I've installed a rack + 4 eazy wheels.
berlinonaut
Veteran
- Location
- Berlin Germany
Did you try them with M-bars on a M-stem and the bike still folds? Would be good to know. What make are these risers? Most of the risers clamp on the bars in an area where the bars are slimming down besides the clamp area, so these will not fit.
ExBrit
Über Member
- Location
- Southern California
You're going to have the same problem with H bars, I suspect. Good thing you didn't spent all that money on them.
I started with M + risers, then M bars, then switched to S + risers, then to S alone and I'm very comfortable despite being about your size. Perhaps time will help.
My understanding is that H stem adds length under the hinge of the stem hence rising folding mechanism up which also means rising the whole handlebar assembly above the ground once folded. H stems have same handlebars as M, why wouldn't it work?
Though I'll definitely use M for the time being to make sure I absolutely need a longer stem.
ExBrit
Über Member
- Location
- Southern California
The extensions have a bit of a dog-leg in them. This gives you some control over how far apart the clamps are so it's quite easy to get them to clamp to the 1" diameter portion of the handlebar. You can barely fold the bike if you push the handlebars forward a little bit, which is what I wanted anyway. They are well made and don't compromise handling at all. The risers are made by Satori and the model name is Aberhallo.
