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Folding Bikes Discuss the unique features and issues of folding bikes. Also a great place to learn what folding bike will work best for your needs.

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Old 10-10-14, 04:00 AM   #1
nz6666
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Anyway to shorten the stem on this bike

The bike:

BFOLD 7 Folding Bike, City Bike MATEX - All Bikes Cycling - On sale at Decathlon.co.uk

I have been using this daily to work and back for one month. Cheap compared to big brands but still like it. Although not particular excellent in any respect (not very small when folded, not very fast, not very light etc) but nor any issue. It's sturdy and value for money. I can just lock it anywhere I want without worrying it being stolen and ride happily in the rain without thinking too much about maintenance.

Now I want to lower the stem to make it more sporty and hence increase some speed (got some strong head wind recently and there will be more when winter comes). I have thought of changing the handlebar to a rode bike type but that will affect the fold-ability, and also not sure if the shifters and brakes can be installed properly. So any idea what short stem for folding bike I can buy to replace the existing one? Are these stems interchangeable? Thanks.

Last edited by nz6666; 10-10-14 at 04:16 AM. Reason: more clear
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Old 10-10-14, 06:28 AM   #2
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well nothing a tig welding can't dọ. just find a local welder and ask him to cut and weld back. had mine done for $40

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Old 10-10-14, 06:59 AM   #3
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I never thought of that.. Thanks.

But at the meantime, found this
Dahon D7 ? Stem Mod | The Everyday Cyclist

It looks like a easier solution, although it may affect fold-ability (not sure how much). Anyone has similar experience?
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Old 10-10-14, 03:25 PM   #4
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A pic of what it looks like at the top would be good. If the whole thing is one solid structure, then sawing the top off and installing a bike stem might work, if the diameter is 1-1/8".
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Old 10-10-14, 04:18 PM   #5
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If you don't want to chop anything,you could always install a riser bar and flip it upside-down.
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Old 10-14-14, 05:36 AM   #6
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Originally Posted by jur View Post
A pic of what it looks like at the top would be good. If the whole thing is one solid structure, then sawing the top off and installing a bike stem might work, if the diameter is 1-1/8".
Here is a pic from internet. The stem (or headset? Don't know what to call it) has a gradient size(bigger at the base and smaller at the top). The size near to the top is about 30 mm. At the end is a clamp to fix the handlebar. The only way I can think of is to remove the clamp at the top then try to find a stem big enough to put on the original stem.
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Old 10-14-14, 05:38 AM   #7
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If you don't want to chop anything,you could always install a riser bar and flip it upside-down.
That's what I am doing now, the reach still not enough for me. But probably this is the best I can get, because even if I managed a drop bar on it, it will not fold as well because the handle bar will be tucked between the wheels when folded. So probably that's it for me. Thanks.

Last edited by nz6666; 10-14-14 at 05:41 AM.
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Old 10-14-14, 12:29 PM   #8
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The exact size is important. 30mm is encouraging, it needs to be 28.8mm. If you can borrow a vernier caliper from a hardware shop that would help.
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Old 10-14-14, 12:49 PM   #9
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I was going to suggest the same, but won't adding a stem cause the same issue. i was going to suggest just pushing a high rise bar forward, bug probably won't work either, watched a youtube video on it, and because goes btwn the wheels, you can't anymore depth in there
http://www.youtube.com%2Fwatch%3Fv%3...pdwh0xCeqwRR_w



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Originally Posted by nz6666 View Post
That's what I am doing now, the reach still not enough for me. But probably this is the best I can get, because even if I managed a drop bar on it, it will not fold as well because the handle bar will be tucked between the wheels when folded. So probably that's it for me. Thanks.
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Old 10-14-14, 01:28 PM   #10
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often the bar riser mast is a quill-wedge inside the fork steerer, that you tighten while the stem is folded over.

That is what My Brompton uses and the folding mast on my Bike Friday Travel bike. threaded headsets.

fork steerer ID in both cases is 1"
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Old 10-14-14, 04:31 PM   #11
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I have done a few go faster folders using drops turned upside down and chopped back. See my threads for more pictures as I rarely post from a pc that accepts pictures uploading.
Bromptom with dahon andros stem extender advice
Scroll down to get the pictures of bikes I have tinkered with
Drops don't tend to fold well. But this arrangement does.
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