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Using BMX frame to make 20" wheel touring bike?



 
 
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  #1  
Old March 6th 08, 04:45 PM posted to rec.bicycles.tech
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Posts: 970
Default Using BMX frame to make 20" wheel touring bike?

I kind of like bicycles with twenty inch tires.

I once had a Bike Friday NWT and found it rolled fast
and was not as cumbersome as a full size wheel bike due
to its 20" wheels. The small wheels made the bike easy
to handle even when not folded. Easy to pick up.....
carry up stairs.... into house..etc.

BUT.... the reality of it was that I didn't NEED the
folding aspect of the NWT frame.... and in fact found
the added complexity of the hinge and al a nuisance

Having said that.... how feasible is it to build a
touring bike out of a good BMX frame? Could have 20"
wheels without the folding aspect.... just use long
handlebar and seat post extensions

see link

http://www.diamondbackbmx.com/depts.asp?deptid=6
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  #2  
Old March 6th 08, 08:46 PM posted to rec.bicycles.tech
Rik O'Shea
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Posts: 75
Default Using BMX frame to make 20" wheel touring bike?


Your best bet is something like a moulton http://www.alexmoulton.co.uk/

I have a bmx, its great for "messing around on" with my childer in
the local park.
As a converison to a touring bike - no way! The frame is very robust
(read heavy) and
the fork only accomodates a bmx ahead style headset and stem, the rear
dropout is for a
single speed and you can only use 15 mm axles... I could go on but I
think you get the idea.

Also check out Cannondale Hooligan - now that's what I call kool!
http://gb.cannondale.com/bikes/08/ce/model-8HL1.html

On Mar 6, 4:45 pm, wrote:
I kind of like bicycles with twenty inch tires.

I once had a Bike Friday NWT and found it rolled fast
and was not as cumbersome as a full size wheel bike due
to its 20" wheels. The small wheels made the bike easy
to handle even when not folded. Easy to pick up.....
carry up stairs.... into house..etc.

BUT.... the reality of it was that I didn't NEED the
folding aspect of the NWT frame.... and in fact found
the added complexity of the hinge and al a nuisance

Having said that.... how feasible is it to build a
touring bike out of a good BMX frame? Could have 20"
wheels without the folding aspect.... just use long
handlebar and seat post extensions

see link

http://www.diamondbackbmx.com/depts.asp?deptid=6


  #3  
Old March 6th 08, 09:08 PM posted to rec.bicycles.tech
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Posts: 970
Default Using BMX frame to make 20" wheel touring bike?

"Rik O'Shea" wrote:

Your best bet is something like a moulton http://www.alexmoulton.co.uk/


Ahh yes.... would LOVE to have a Moulton but just too
pricey!! Ouch!

Also check out Cannondale Hooligan - now that's what I call kool!
http://gb.cannondale.com/bikes/08/ce/model-8HL1.html


Very cool!!!

I go this idea from the latest Adventure Cyclist mag I
subscribe to.

They had an article abt RAGBRAI in it and a picture of
a guy that did the tour on what "looks" like a BMX bike
rigged up as a touring bike! No kidding. So I decide
to post abt this idea!!
  #4  
Old March 6th 08, 09:13 PM posted to rec.bicycles.tech
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Posts: 970
Default Using BMX frame to make 20" wheel touring bike?

"Rik O'Shea" wrote:

Also check out Cannondale Hooligan - now that's what I call kool!
http://gb.cannondale.com/bikes/08/ce/model-8HL1.html


What's this thing cost?

Where to buy via mail order?
  #5  
Old March 6th 08, 09:20 PM posted to rec.bicycles.tech
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Posts: 970
Default Using BMX frame to make 20" wheel touring bike?

"Rik O'Shea" wrote:

Also check out Cannondale Hooligan - now that's what I call kool!
http://gb.cannondale.com/bikes/08/ce/model-8HL1.html


Crap!!!

Doesn't look like its available in the USA!!!

Not listed on the cannondale USA site anyway!! Why?
  #6  
Old March 6th 08, 09:30 PM posted to rec.bicycles.tech
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Posts: 1,299
Default Using BMX frame to make 20" wheel touring bike?

On Mar 6, 11:45*am, wrote:
I kind of like bicycles with twenty inch tires. *

I once had a Bike Friday NWT and found it rolled fast
and was not as cumbersome as a full size wheel bike due
to its 20" wheels. The small wheels made the bike easy
to handle even when not folded. Easy to pick up.....
carry up stairs.... into house..etc.

BUT.... the reality of it was that I didn't NEED the
folding aspect of the NWT frame.... and in fact found
the added complexity of the hinge and al a nuisance

Having said that.... how feasible is it to build a
touring bike out of a good BMX frame? Could have 20"
wheels without the folding aspect.... just use long
handlebar and seat post extensions

see link

http://www.diamondbackbmx.com/depts.asp?deptid=6


Is anyone still making something like the Haro Dart? 6SPD 20" rear
wheel, plenty fast and light, pretty compact. I loved mine when I was
younger, until that roller disk brake failed and I wrecked the thing
into a car. http://bmxmuseum.com/bikes/haro/260

This guy was selling one for $150 at the end of 06, maybe there are
more to be had. Hell, if I saw one of those for $150 I'd probably buy
it for nostalgia.
  #7  
Old March 7th 08, 06:24 AM posted to rec.bicycles.tech
Ryan Cousineau
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Posts: 4,044
Default Using BMX frame to make 20" wheel touring bike?

In article
,
"Rik O'Shea" wrote:

On Mar 6, 4:45 pm, wrote:
I kind of like bicycles with twenty inch tires.

I once had a Bike Friday NWT and found it rolled fast
and was not as cumbersome as a full size wheel bike due
to its 20" wheels. The small wheels made the bike easy
to handle even when not folded. Easy to pick up.....
carry up stairs.... into house..etc.

BUT.... the reality of it was that I didn't NEED the
folding aspect of the NWT frame.... and in fact found
the added complexity of the hinge and al a nuisance

Having said that.... how feasible is it to build a
touring bike out of a good BMX frame? Could have 20"
wheels without the folding aspect.... just use long
handlebar and seat post extensions


Your best bet is something like a moulton http://www.alexmoulton.co.uk/

I have a bmx, its great for "messing around on" with my childer in
the local park.
As a converison to a touring bike - no way! The frame is very robust
(read heavy) and
the fork only accomodates a bmx ahead style headset and stem, the rear
dropout is for a
single speed and you can only use 15 mm axles... I could go on but I
think you get the idea.


Sir! I would direct you to the lighter end of the BMX racing frames,
where frame weights dip below 3 pounds:

http://www.bikemania.biz/ProductDeta..._Frame_CarbonP
ro5

For a normal seating position, you're going to need a long seatpost.
Recent BMX frames tend towards MTB seatpost diameters, so long seatposts
are available, at least if you're not too tall or too heavy. Getting the
bars high enough may or may not be a problem: a low road-style bar
position isn't going to be much higher than the normal place where BMX
bars go, and a high bar position can use either a tall stem or a
BMX-style riser bar.

BMX frame ends or not, there are derailer claws that will allow you to
hang a derailer off the back. I did this myself in converting an old
Kuwahara to a 6-speed, but a derailer drivetrain will also require a
frame respacing, which is only practical with a steel BMX frame.

For non-steel frames, you could use a hub gear system, of which the
obvious choice is the Sturmey-Archer XRF-8, which has 8 speeds, can be
as narrow as 115 mm, and has gearing especially suited to small wheels.

http://sheldonbrown.com/harris/sturmey-archer-hubs.html

Note that 115 mm is a bit wider than the stock width of 110 mm for BMX
rear ends, but it shouldn't matter.

This is a fun project, and I think the variant with a hub gear makes for
an interesting and very practical small-wheeler. The combined markets of
serious folders and recumbents mean there are some very nice wheels and
tires available if you want to spend some money on upgrades.

S-A claims 1840g for their 8-speed hub. Roughly speaking, add that to
the bike weight of a lightweight BMX, wave your hands a bit, and that's
probably what your finished bike would weigh, though there's a lot of
room to replace BMX-oriented parts with lighter bits if bike weight is a
real issue for you.

That said, I'd be flabbergasted if you could make the bike weigh more
than 30 pounds, and I think that 25 pounds would be possible with enough
money and parts changing.

A Norco Pro BMX weighs about 23 pounds:

http://www.norco.com/bikes/bmx/race/norco_pro_bmx.php

These are not heavy bikes, and they're cheap. Go for it!

--
Ryan Cousineau http://www.wiredcola.com/
"In other newsgroups, they killfile trolls."
"In rec.bicycles.racing, we coach them."
  #8  
Old March 7th 08, 07:57 PM posted to rec.bicycles.tech
JennyB
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Posts: 46
Default Using BMX frame to make 20" wheel touring bike?

On Mar 7, 6:24*am, Ryan Cousineau wrote:
In article
,
*"Rik O'Shea" wrote:



On Mar 6, 4:45 pm, wrote:
I kind of like bicycles with twenty inch tires.


I once had a Bike Friday NWT and found it rolled fast
and was not as cumbersome as a full size wheel bike due
to its 20" wheels. The small wheels made the bike easy
to handle even when not folded. Easy to pick up.....
carry up stairs.... into house..etc.


BUT.... the reality of it was that I didn't NEED the
folding aspect of the NWT frame.... and in fact found
the added complexity of the hinge and al a nuisance


Having said that.... how feasible is it to build a
touring bike out of a good BMX frame? Could have 20"
wheels without the folding aspect.... just use long
handlebar and seat post extensions


A better basis might be a Xootr Swift
http://www.xootr.com/xootr/swift/bikes.shtml

  #9  
Old March 7th 08, 09:24 PM posted to rec.bicycles.tech
[email protected]
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Posts: 970
Default Using BMX frame to make 20" wheel touring bike?

JennyB wrote:

Having said that.... how feasible is it to build a
touring bike out of a good BMX frame? Could have 20"
wheels without the folding aspect.... just use long
handlebar and seat post extensions


A better basis might be a Xootr Swift
http://www.xootr.com/xootr/swift/bikes.shtml


I don't need the folding aspect

Just want small compact wheels
  #10  
Old March 7th 08, 09:49 PM posted to rec.bicycles.tech
JennyB
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Posts: 46
Default Using BMX frame to make 20" wheel touring bike?

On Mar 7, 9:24*pm, wrote:
JennyB wrote:
Having said that.... how feasible is it to build a
touring bike out of a good BMX frame? Could have 20"
wheels without the folding aspect.... just use long
handlebar and seat post extensions


A better basis might be a Xootr Swift
http://www.xootr.com/xootr/swift/bikes.shtml


I don't need the folding aspect

Just want small compact wheels


I know, but in this case the folding aspect seeme not to add to weight
and complication.
 




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