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My DH Prototype Pictures

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My DH Prototype Pictures
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flag sirknumskullgt
Posted: Sep 30, 2008 at 19:05 Quote
Just painted and parted up the rest of my DH prototype. More pictures and what not on my website http://www.nobsbikes.com and on my profile.

Enjoy.

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flag crazydutchmen
Posted: Sep 30, 2008 at 19:07 Quote
hows it working for ya? like in comparison to other bikes
flag anti-guitar-hero
Posted: Sep 30, 2008 at 19:10 Quote
dude, that is sweet, best homemade/personal prototype bike ever!
flag sirknumskullgt
Posted: Sep 30, 2008 at 19:13 Quote
crazydutchmen wrote:
hows it working for ya? like in comparison to other bikes

Both my bikes are working absolutely fantastic. All the theories I had about the bike suspension on paper are working perfectly on them so all the hard work and tedious attention to detail was worth it. Great wheelpath, very very active in the top end, super progressive, no pedal kickback, great pedaling pocket in the leverage curve, short rear end. Its all good so far except for the head angle is a bit slack. Will correct on the next one but this was mostly to have a rideable concept of the linkage design.
flag ridetrails
Posted: Sep 30, 2008 at 19:15 Quote
anti-guitar-hero wrote:
dude, that is sweet, best homemade/personal prototype bike ever!
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2283826

this is the best homemade bike, but yeah urs is sweet by the way
flag crazydutchmen
Posted: Sep 30, 2008 at 19:18 Quote
sirknumskullgt wrote:
crazydutchmen wrote:
hows it working for ya? like in comparison to other bikes

Both my bikes are working absolutely fantastic. All the theories I had about the bike suspension on paper are working perfectly on them so all the hard work and tedious attention to detail was worth it. Great wheelpath, very very active in the top end, super progressive, no pedal kickback, great pedaling pocket in the leverage curve, short rear end. Its all good so far except for the head angle is a bit slack. Will correct on the next one but this was mostly to have a rideable concept of the linkage design.
thats awesome dude, im glad to see something different
flag sirknumskullgt
Posted: Sep 30, 2008 at 19:22 Quote
Thanks I wanted to do my bikes all my own way. The linkage and frame designs are 100% one of a kind and they all work like a charm. Im not messing around here.
flag Hombre3000
Posted: Sep 30, 2008 at 19:23 Quote
How do you get away with such little chain/chainring contact? I would be really scared of skipping chains. Why is the roller so high up?

By the way, this looks great too. I like the the look of the other one even more, though.
flag sirknumskullgt
Posted: Sep 30, 2008 at 19:33 Quote
The plan originally was to throw a chain guide on it and angle it forward so that you would get a normal wrap around the chainring, but when I threw it together for the first time and rode it there was no skippage and its worked ever since.

The reason it is so high is because the wheelpath is so rearward that it requires it or else theres loads of pedal feedback. It basically is like a jackhammer when you pedal it off the roller. Thats the problem with just about all full supsension bikes out there whether they are vp or single pivot. They are all limited to having a wheelpath that is concentric to the bottom bracket which sacrifices the small bump and square edge performance. If you have a jackshaft like on BMWs or a BB7 then you get the wheelpath and the chain isolation but its stuck to a single pivot. Canfield uses a chain roller similar to mine.
flag Hombre3000
Posted: Sep 30, 2008 at 20:33 Quote
sirknumskullgt wrote:
The plan originally was to throw a chain guide on it and angle it forward so that you would get a normal wrap around the chainring, but when I threw it together for the first time and rode it there was no skippage and its worked ever since.

The reason it is so high is because the wheelpath is so rearward that it requires it or else theres loads of pedal feedback. It basically is like a jackhammer when you pedal it off the roller. Thats the problem with just about all full supsension bikes out there whether they are vp or single pivot. They are all limited to having a wheelpath that is concentric to the bottom bracket which sacrifices the small bump and square edge performance. If you have a jackshaft like on BMWs or a BB7 then you get the wheelpath and the chain isolation but its stuck to a single pivot. Canfield uses a chain roller similar to mine.

Interesting. I'm trying to understand how that affects things.

I've seen it a lot recently with some of the new bikes, but most of them have another roller in line with the chainstay, which wraps the chain around the bottom half of the chainring.

It really sucks that it can be so limiting.
flag sirknumskullgt
Posted: Oct 1, 2008 at 11:04 Quote
I was toying around with a logo for my bike company No BS Bikes and this is what I came up with.

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What do you all think?
flag mr-wilson
Posted: Oct 1, 2008 at 11:25 Quote
Hombre3000 wrote:
How do you get away with such little chain/chainring contact? I would be really scared of skipping chains. Why is the roller so high up?

By the way, this looks great too. I like the the look of the other one even more, though.

Knolly is using a similar system.
Unsecure image, only https images allowed: http://www.sicklines.com/news-images/interbike_2008/knollly_interbike_20085s.jpg
The symbol above is good, will it look good reduced on the bike though.
flag ad0912
Posted: Oct 1, 2008 at 11:36 Quote
Unsecure image, only https images allowed: http://www.chinamtb.com/wordpress/wp-content/uploads/2008/02/millyard-racing.jpg
millyard racing 0001 built from scratch and has a internal gearbox and even the rear shox is hand made and the shock aint bent
flag sirknumskullgt
Posted: Oct 1, 2008 at 12:06 Quote
Yeah thats probably why the shock is bent already.
flag jonbikes
Posted: Oct 1, 2008 at 15:01 Quote
Definitally a decent job. What are some of the specs on the frame?

You say this is a prototype, so I assume you are going to make another version with non pencil thin stays?
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