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View Full Version : Similarities between Balfa 2Step & VPP

powderboy
02-08-2003, 01:46 AM
So, I'm no engineer, nor do I know the in's and out's of the VPP design.

But, I'm waiting for my new 2Step to come (should be here in a couple of weeks) and I got to thinking that the pivot placement of the 2Step seems to provide a similar wheel path and motion to the VPP design.
http://www.avalanchedownhillracing.com/2_step.jpg
Look at the Blur:
http://www.feedthehabit.com/interbike2002/indoor_pics/santa_cruz_blur.jpg
Now, let me repeat myself, I'M NO ENGINEER. I just calls it as I sees it and they seem to be very similar. From what I've heard of the ride quality of the 2Step, it wouldn't surprise me if it was very VPP-like.

Anyone capable of shedding light on this subject?
dhmtbj
02-08-2003, 01:27 PM
The VPP patent refers to the axle path of the suspension. The 2step has a rearward axle path and the VPP bikes have an s-shaped path. I believe they both use similar methods to accomplish good pedaling.
powderboy
02-08-2003, 01:33 PM
Originally posted by ellsworth
The VPP patent refers to the axle path of the suspension. The 2step has a rearward axle path and the VPP bikes have an s-shaped path. I believe they both use similar methods to accomplish good pedaling.
That makes sense... the Blur does look like an obvious "S" shaped wheel path. They both use similar double linkages though, so that's what first caught my attention.
Thylacine
02-09-2003, 05:48 PM
I havent drawn it up, but the Balfa doesnt seem to me to have a rearward axle path. I think it initially does, but then it looks to me like it straightens up. It could very well have a 'similar' path to the VPP - I'm not sure.

Other bikes like this are an Azonic ( I think it was maketted under a different name initially ) and a Brodie proto from the early 90's, to the Canfield bros bike which is a slightly modded version using an idler wheel.

Now, from what I understand is that with the VPP design, its designed to run a LOT of sag, so that there is a pedal 'zone' that aligns chain forces and acts as a kind of 'lockout' when the suspension is within this zone. Outside this zone the bump forces overcome the chain forces and the wheel moves more freely along its path.

Again, I could be wrong, but the Balfa is different to this. Similar, but I could guess you could say not as complex.