Low rise, 3" 4" 5", bmx bars on an MTB

PB Forum :: Dirt Jumping & Street
Low rise, 3" 4" 5", bmx bars on an MTB
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Posted: Feb 23, 2016 at 13:32 Quote
FaithUSA wrote:
I've been thinking of this since installing a shorter rigid fork.

Do the mtb brand bars with cross bar have a 31.8 clamp area?
Trying to figure out if I could still use my stubby Atomlab stem and try some 4" bars.
OR
I have plenty of BMX stems and could use it with 4" BMX bars.

No I've never heard or seen of a handlebar with cross bar that has 31.8mm clamp area.

Matt at STOUT (north of Houston) made a 25.4 clamp-area 4" rise bar.

https://www.pinkbike.com/photo/12644328/

Posted: Feb 24, 2016 at 12:00 Quote
So I'd have to run a BMX stem?

Most BMX stems are 50mm or greater length.
I'm pretty sure my mtb stem is shorter.
I'd have to find a pretty stubby BMX stem.

Those bars look good.^^
You're telling me that the bulgy part of the clamp area is only 25.4?

Posted: Feb 24, 2016 at 13:43 Quote
FaithUSA wrote:
So I'd have to run a BMX stem?

Most BMX stems are 50mm or greater length.
I'm pretty sure my mtb stem is shorter.
I'd have to find a pretty stubby BMX stem.

Those bars look good.^^
You're telling me that the bulgy part of the clamp area is only 25.4?

In that link, Matt himself said it was 25.4.

Yeah, you're right most bmx stems are around 50mm, but there are definitely short ones out there: http://flatlandfuel.com/stems.aspx

Nothin' wrong with 50mm reach on an mtb though! Cool

Posted: Feb 24, 2016 at 16:45 Quote
Historically, I've run longer top tubes and really short stems.
In the 80s for BMX the longest top tube lengths were like 19".
This caused anyone over 5' 8" to start running long stems.
Personally this really affected how the bike handled because:
a. it put your weight way over the front axle
b. you weren't turning the bars around the pivot of the steer tube. it was more of a lever effect if that makes sense.

I'd rather run a 21.5" top tube and a 50mm stem than a 19" top tube and a 88mm stem.

So with my 22" TT Riot frame I want a really short stem.
I can't think what my Atomlab stem is, but it is short.

Posted: Feb 25, 2016 at 6:28 Quote
I run a 45mm offset bmx stem with my 5.5" bars, works pretty good

Posted: Feb 25, 2016 at 9:06 Quote
Aaronz25RS wrote:
I run a 45mm offset bmx stem with my 5.5" bars, works pretty good
Aaron,
What brand and model stem?
photo?

Posted: Feb 27, 2016 at 12:39 Quote
Its a FIT bmx, not sure of model, ebay special

Unsecure image, only https images allowed: http://img.photobucket.com/albums/v108/sublimewind/Bike%20Pics/20150705_211104.jpg

Posted: Aug 31, 2016 at 22:28 Quote
FaithUSA wrote:
I've been thinking of this since installing a shorter rigid fork.

Do the mtb brand bars with cross bar have a 31.8 clamp area?
Trying to figure out if I could still use my stubby Atomlab stem and try some 4" bars.
OR
I have plenty of BMX stems and could use it with 4" BMX bars.

I know this is a semi old thread but I just thought i'd add to it for anyone that comes across this thread in the future while searching this topic...

BMX bars are vary rarely available in a 31.8mm diameter... but I did come across some Stay Strong Cruiser Race Handlebars that are 31.0mm (didnt even know that was a stem size, I don't think i've ever seen a 31.0mm stem before) but if you want to run a short mtb stem and don't mind the bar height being 5.75" i'm sure you could easily find the appropriate size bar shim to run a 31mm bar with a 31.8mm stem

http://www.chainreactioncycles.com/ca/en/stay-strong-cruiser-race-handlebars/rp-prod147395

Posted: Aug 31, 2016 at 22:35 Quote
Aaronz25RS wrote:
Been running "tall" bars for some time now these being S&M aluminum 5.5" down from 7.5"..
Unsecure image, only https images allowed: http://img.photobucket.com/albums/v108/sublimewind/Bike%20Pics/IMG_20150311_165505.jpg
The others I ran where 7.5" and it was great for street, but when it came to park or dirt it was too much for transitions, pump tracks it was just way too much.. The 5.5 works better..
Unsecure image, only https images allowed: http://img.photobucket.com/albums/v108/sublimewind/Bike%20Pics/IMG_20140730_221630.jpg
Ive gotten a pretty awesome amount of hate for it to be honest, I care less, but its pretty amazing the hate you can drum up over a bar choice..

Just wondering how tall are you? thats wild you rode with a 7.5" bar on a dj bike but i suppose if its comfy and normal feeling to you then thats all that matters... anyways im like 6'4" and been looking into riser bars and was thinking of going with a 5" to 5.5" bar but seems like must people stick to about 4" on dj bikes (still seems a bit short for me) so just wondering what your height is so i can get a better idea of whether i should give 5.5s a try or just stick to the more standard 4" cruiser bars and hope that they grow on me a bit.

Posted: Sep 2, 2016 at 22:11 Quote
You can get shims to run 31.8 on 25.4

Posted: Sep 3, 2016 at 8:44 Quote
allsk8sno wrote:
You can get shims to run 31.8 on 25.4

yep, as well as 25.4 to 22.2. i've used them and they do work.

Posted: Sep 7, 2016 at 8:09 Quote
Hook02 wrote:
Aaronz25RS wrote:
Been running "tall" bars for some time now these being S&M aluminum 5.5" down from 7.5"..
Unsecure image, only https images allowed: http://img.photobucket.com/albums/v108/sublimewind/Bike%20Pics/IMG_20150311_165505.jpg
The others I ran where 7.5" and it was great for street, but when it came to park or dirt it was too much for transitions, pump tracks it was just way too much.. The 5.5 works better..
Unsecure image, only https images allowed: http://img.photobucket.com/albums/v108/sublimewind/Bike%20Pics/IMG_20140730_221630.jpg
Ive gotten a pretty awesome amount of hate for it to be honest, I care less, but its pretty amazing the hate you can drum up over a bar choice..

Just wondering how tall are you? thats wild you rode with a 7.5" bar on a dj bike but i suppose if its comfy and normal feeling to you then thats all that matters... anyways im like 6'4" and been looking into riser bars and was thinking of going with a 5" to 5.5" bar but seems like must people stick to about 4" on dj bikes (still seems a bit short for me) so just wondering what your height is so i can get a better idea of whether i should give 5.5s a try or just stick to the more standard 4" cruiser bars and hope that they grow on me a bit.

Im 6'0" but also 43 with a bad back..

My bike with the 5.5's is aslo street frame with a 72* HT so the tall bars don't lay back as bad as say my actual DJ with a 69* HT, that I run 3" rise with a flipped BMX stem (making 3.5")..

Tall bars offer more leverage and I haven't noticed much difference in the 5.5 bars.. the 7.5" bars, well that was a bit much, but it was also a test.. I had a 24" BMX and just swapped bars and stem to see IF it would actually work and it did, till I took it to RAYSMTB and pumping around got really difficult and tiresome (on the 7.5") it was just too much..

The 5.5 just seems perfect, now if only I could fix my back..

Cheers

Posted: Sep 7, 2016 at 8:28 Quote
FaithUSA wrote:
Aaronz25RS wrote:
I run a 45mm offset bmx stem with my 5.5" bars, works pretty good
Aaron,
What brand and model stem?
photo?

Im not Aaron but i also run a 45mm stem. Odyssey TDFL. theres lots of street specific stems for bmx that arent 50mm


 
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