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Search: Posts Made By: jondrums
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01-16-06, 09:20 AM
Replies: 15
Views: 1,090
Posted By jondrums

I've got a friend with a madone, and he just...

I've got a friend with a madone, and he just screwed up the derailer mount and sent it back in for service. only $25 to replace the dropout! Apparently the dropouts are actually glued in with hot...
11-03-05, 12:11 PM
Replies: 10
Views: 780
Posted By jondrums

as a person who has worked in a machine shop,...

as a person who has worked in a machine shop, I'll chip in with these comments:
1) you'd have to take apart the wheel down to the hub for this - I seriously doubt anyone would do this with the...
10-27-05, 03:53 PM
Replies: 21
Views: 2,282
Posted By jondrums

so I decided to really geek out and add in terms...

so I decided to really geek out and add in terms for:
handlebar force = 25lbs (total guess)
backpedal upwards force = 25lbs (total guess)
rider's weight = 205lbs
bike's weight = 20lbs

This...
10-27-05, 03:07 PM
Replies: 21
Views: 2,282
Posted By jondrums

Ok here's the source for that formula. First a...

Ok here's the source for that formula. First a few things -
I am assuming that handlebar force and backleg force are both zero. Also I am assuming that the rider's FULL weight is on the foward...
10-27-05, 12:02 PM
Replies: 21
Views: 2,282
Posted By jondrums

Hi all- I got real curious the other night...

Hi all-
I got real curious the other night about gear inches and going up hills. It got me thinking about really geeky stuff like the theoretical maximum incline you could go up with a certain...
06-29-05, 01:48 PM
Replies: 8
Views: 2,738
Posted By jondrums

1" quill stem for oversized bars

I really want to use the Deda Pista bars on my bike, but I have 1" threaded fork. anyone know if there's a quill stem out there which will work with oversized bars (31.7mm)?

How about maybe...
05-31-05, 04:19 PM
Replies: 60
Views: 2,799
Posted By jondrums

OK, there's no hardware store I know of that will...

OK, there's no hardware store I know of that will carry anything even remotely suitable as a bike chain. They all use bolt cutters to cut you a piece and that means that anyone with a bolt cutter...
03-03-05, 12:04 PM
Replies: 30
Views: 3,349
Posted By jondrums

ken - I say bull. if you want to be a...

ken - I say bull. if you want to be a perfectionist about your chainline, don't let anyone rain on your parade. yeah its useless to get that last .5mm but if it makes you feel better, for god sakes...
03-02-05, 04:21 PM
Replies: 30
Views: 3,349
Posted By jondrums

I presume you probably have a pair of calipers...

I presume you probably have a pair of calipers somewhere you could borrow? Well here's my process for chainline tuning...

Measure the following things:
Tcr (thickness of chainring)
Tcg...
02-18-05, 01:03 PM
Replies: 28
Views: 1,230
Posted By jondrums

ok, with all that in mind (prev. msg), I'm...

ok, with all that in mind (prev. msg), I'm thinking about scaling back the project for now, to just be a useable map whose primary innovation is "a well thought out method for conveying slope and...
02-18-05, 12:58 PM
Replies: 28
Views: 1,230
Posted By jondrums

I contacted Lon (on yahoo groups bike messenger...

I contacted Lon (on yahoo groups bike messenger forum) and here is his response for your edification...

Hey Jon-

Thank you for your interest! Yes, absolutely the
project is still ongoing - has...
02-18-05, 12:55 PM
Replies: 28
Views: 1,230
Posted By jondrums

bostontrevor: Exactly!! except whos to say...

bostontrevor: Exactly!! except whos to say you're going up or down. That depends on what direction you're going to ride.... So you can't use red for up, and blue for down, unless you have a...
02-18-05, 02:10 AM
Replies: 28
Views: 1,230
Posted By jondrums

slider: you're right. I think I will want to...

slider: you're right. I think I will want to talk to the bike coalition folks and see what they say. I'm not going to sell it, so I can't imagine they would be too pissed about it.

Judah: I...
02-17-05, 05:43 PM
Replies: 28
Views: 1,230
Posted By jondrums

On second thought, having a *number* for...

On second thought, having a *number* for hill-steepness isn't really necessary. I think Color is an excellent way to communicate steepness. Just maybe a whole lot more than 3 shades of pink is what...
02-17-05, 05:32 PM
Replies: 28
Views: 1,230
Posted By jondrums

I missed the blue topo stuff before! Good...

I missed the blue topo stuff before! Good suggestions all. I'm going to try and email Lon to see what he/she has going so far. I love the tyvek idea, I'm going to see about what it takes to print...
02-17-05, 02:19 PM
Replies: 28
Views: 1,230
Posted By jondrums

SF - new bike map?

Hey all SF'ers, I've been thinking for a while about making a better bike map of SF. We all know about the bike coalition map with three colors for hill steepness, but I've been had by that map more...
12-02-04, 09:07 PM
Replies: 33
Views: 969
Posted By jondrums

you guys let a newbie in on the ride for a while...

you guys let a newbie in on the ride for a while (until I can't keep up or whatnot)? I'd be interested to meet other fixie riders around but I have no idea what kind of ride you're all intending
11-10-04, 04:19 PM
Replies: 13
Views: 1,110
Posted By jondrums

my longest trackstand ever was glorious, and it...

my longest trackstand ever was glorious, and it was right in front of all my buddies. Too bad that after a little while of seemingly perfect balance, I noticed that the local prankster has crept up...
11-04-04, 07:13 PM
Replies: 11
Views: 688
Posted By jondrums

alright sounds like i have no need for SS...

alright sounds like i have no need for SS chainring, nor for a SS cog
thx all
11-04-04, 07:10 PM
Replies: 10
Views: 499
Posted By jondrums

awright - i'll bite but I need more info ...

awright - i'll bite but I need more info
threaded or threadless headset?
In other words, does the fork have a shaft (called the steerer) connected to it that is threaded around its outside all...
11-04-04, 06:37 PM
Replies: 11
Views: 688
Posted By jondrums

so, I only have so much spare time for fun...

so, I only have so much spare time for fun projects. a stainless chainring is much less cool than some of the other things I have in mind.
11-04-04, 06:00 PM
Replies: 11
Views: 688
Posted By jondrums

I've got a CNC mill glomarduck, but I'm not going...

I've got a CNC mill glomarduck, but I'm not going to bother if it won't make much difference. Not a trivial project, I must say, and the end result isn't cool enough to justify that kind of time,...
11-04-04, 01:39 PM
Replies: 11
Views: 688
Posted By jondrums

Stainless Chainring?

Anyone know if its possible to get a Stainless Steel 1/8" chainring for 144bcd (5 arm)?
I know surly makes some but they don't seem to make them for 5 arm 144 (unless I'm wrong).
Also, is there any...
Showing results 1 to 23 of 23


 
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