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ecovelo 03-05-11 12:36 AM

Plumb Bob
Anyone have/use a plumb bob for bike fitting? If so.... where did you find yours?

I've been visiting hardware stores for months trying to find a small
one - keep finding these large to humongous ones (8-24 oz). Checked online and it seems Stanley makes a 4oz one for $5~$7 - but I can't find a distributor.

I noticed there are some that are "custom" for bike fit - but they are ridiculously expensive and I don't think there is anything "custom" about a plumb bob :rolleyes:
- (or is there?)

I think I've become obsessed with every nuance of bike fit... and now want to see where my patella is relative to the pedal spindle (k.o.p.s. fit test) on all my bikes and see if I can tell a difference in injury aggravation with micro adjusting.

Any insight is greatly appreciated :)

Seve 03-05-11 12:42 AM

If you have a piece of string and say a 3/4" nut or similar etc. it will do the same thing.

Or do you feel that you need something more precise ?

ecovelo 03-05-11 12:49 AM

Well I wondered about that.... I was gonna steal (oops borrow) a piece of brass from work that I could pull a string through, and someone I spoke to (can't remember who) thought it needed to have a "point" - even for the (bike fit) job I was describing. Now I admit.... I struggled with Physics in college...... :o

alanknm 03-05-11 01:22 AM,53212,32471

it's 2" but it's expensive.

Northwestrider 03-05-11 01:32 AM

Just make your own if you like, a string, or fishing line, and a weight, viola

B.Alive 03-05-11 06:29 AM

I used sewing thread and a washer. You just needbto make sure the weight is heavy enough to pull your string tight. If tie the string with a loop bigger than what it's being tied to, gravity will pull it straight.

pbd 03-05-11 09:21 AM

1 Attachment(s)
Fishing weight.

DX-MAN 03-05-11 11:58 AM

Flotation rope and a McD's Quarter Pounder. (j/k)

Seriously, I've used fishing line, small twine, nylon thread, and 3/4" hex nuts, whatever was handy.

prathmann 03-05-11 12:16 PM

Yes, just about anything will do. A little heavier is good so it isn't as likely to be blown around - and for the string you want to use some that's reasonably flexible so it gets pulled straight. I use some thread tied to the round opening at the end of a cresent or other wrench. No need for any special tool.

ecovelo 03-05-11 02:46 PM

Awesome. simple. Thanks for all the input! :)

ecovelo 03-05-11 02:49 PM


Flotation rope and a McD's Quarter Pounder. (j/k)

That would mean I'd have to visit a McDs then and that's just gross.... :twitchy:

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