Calling Lahar And Balfa Owners!

dh_winner · *by **dh_winner** on Sat 19/May/07 11:22am*

Im workin on a bit of a project and in after some measurements to see if im in the ball park. Those of you out there who own a balfa, Lahar or any other high pivot bike could you please after the measure from your crankbolt to the center of the top pivot.
Im particularly interested in Lahars.
Cheers :thumbsup:

giantdh · *by **giantdh** on Sat 19/May/07 12:16pm*

I own a balfa! its 180mm

MVink · *by **MVink** on Sat 19/May/07 1:04pm*

It's 7inch on Balfas, hence the 7 in BB7.

biGHiT-bOy · *by **biGHiT-bOy** on Sat 19/May/07 7:41pm*

Why don't you give Aaron at Lahar a hollah?

DropKick · *by **DropKick** on Sat 19/May/07 8:22pm*

"Hey Aaron, just gonna steal some ideas, could you give me some measurements"

Wobbler · *by **Wobbler** on Sat 19/May/07 9:13pm*

A side on picture based on a wheel is this big etc should give you a pretty good idea about the height of them.

dh_winner · *by **dh_winner** on Sat 19/May/07 10:09pm*

cheers for the blafa measurements. Any lahars out there? i would prefer not to estimate off pics or risk pissing off manufacturers.

NightKid · *by **NightKid** on Sun 20/May/07 2:49am*

Dave Scandrett and a couple of other chchers have Lahars, next time you see them up in the hills why don't you ask if you can have a looksie?

Wobbler · *by **Wobbler** on Sun 20/May/07 9:15am*

Wouldn't the distance fore and aft of the cranks also be important? If you need it accurate enough where you cant estimate then you'll need that also.

El_DHer · *by **El_DHer** on Sun 20/May/07 9:22am*

there was onein post your ride a while ago

ClenchedTeeth · *by **ClenchedTeeth** on Sun 20/May/07 11:06am*

dh_winner wrote: i would prefer not to estimate off pics or risk pissing off manufacturers.

Wouldn't you only want a rough estimate anyway? I mean unless you're copying their design 100%, there's not much reason to need it exactly right, is there?
Anyway you could get a hold of an owner's manual pdf, which will have a nice technical drawing of the frame, and it will list sizes like top tube length etc that will let you calibrate the scale.

JohnnyC · *by **JohnnyC** on Sun 20/May/07 5:40pm*

dh_winner wrote: cheers for the blafa measurements. Any lahars out there? i would prefer not to estimate off pics or risk pissing off manufacturers.

The DHV uses a pivot point that gives the rear wheel a wheel path parallel to the head angle of the front wheel at bottom out. So the tangent of the wheel path when bottomed out would be about 62-63 degrees. This keeps the wheel base more or less constant rather then shortening as the suspension compresses. You should be able to work it out from there but also search through the forums on www.ridemonkey.com where Aarons posted all the technical theory behind it, just search for Lahar.

scoobydoo · *by **scoobydoo** on Sun 20/May/07 11:01pm*

Don't know what your project is but this may be helpful.

If you read and understand this you will be able to design a rear suspension system that squats, jacks or is unaffected by pedalling and weight transfer forces. It's up to you as the designer, this is the pedalling geometry. Bump absorption is a seperate issue, i'm sure most people who have ridden a high pivot bike will agree bump eating is better if your pivot is high.

Any questions?