ADVrider

ADVrider (http://www.advrider.com/forums/index.php)
-   Sports (http://www.advrider.com/forums/forumdisplay.php?f=72)
-   -   Bicycle thread (http://www.advrider.com/forums/showthread.php?t=150964)

pierce 05-22-2010 11:37 AM

Quote:

Originally Posted by trailer Rails
I am not worried, it is a 5mm difference, 2.5mm on each side. The bottom bracket shell flexes more than that back and forth when I crank up a big hill.

another consideration is if when spread, the dropouts are still parallel. if they aren't, it puts a nasty torque load on your axle and can lead to either bearing failure or broken axles.

http://www.parktool.com/images_inc/r...help/FFG19.jpg http://www.parktool.com/images_inc/r...help/FFG09.jpg

trailer Rails 05-22-2010 12:12 PM

Thanks guys,

I have been a bike mechanic for the last 18 years, I know a thing or two about these things.

I am not sure how to figure this out but I think my chainstays are somewhere around 15", I moved them 2.5mm. :eek1 OMG, that has to at at least a quarter of a degree out of alignment. It is amazing my my axle did not break or my bearings did not fail already!:lol3

pierce 05-22-2010 12:25 PM

Quote:

Originally Posted by trailer Rails
Thanks guys,

I have been a bike mechanic for the last 18 years, I know a thing or two about these things.

I am not sure how to figure this out but I think my chainstays are somewhere around 15", I moved them 2.5mm. :eek1 OMG, that has to at at least a quarter of a degree out of alignment. It is amazing my my axle did not break or my bearings did not fail already!:lol3

15" is 380mm. atan(2.5/380) in degrees == about 0.4 degree.

yeah, thats not a lot, but when you clamp down that quickrelease, you'll be applying torque on the dropout as well as the axle... if there's any carbon fiber in your stays, i"d be watching the joint where the dropout joins the stay. stressed carbon is unhappy carbon.

Gummee! 05-22-2010 02:18 PM

Quote:

Originally Posted by pierce
15" is 380mm. atan(2.5/380) in degrees == about 0.4 degree.

yeah, thats not a lot, but when you clamp down that quickrelease, you'll be applying torque on the dropout as well as the axle... if there's any carbon fiber in your stays, i"d be watching the joint where the dropout joins the stay. stressed AL is unhappy AL.

fixt

M

pierce 05-22-2010 06:05 PM

heh. resurrected another pile of junk from my driveway. my boy's old GT Rebound, something we'd bought used when he was 5' tall, that he long ago outgrew... this is the bike that donated its wheels to repair my cruiser as overly documented above....

so, I took the wheels of my other kids even tinier Hardrock, cleaned up the GT, readjusted everything, a bit of triflow on important bits, soaked the chain in WD40 and wiped down several times, then airdried and dribbled a bit of triflow on it, and took the uber-phat gel seat I'd just gotten for my wife's ancient heavy stumpjumper, and removed the lame bar end extenders (never liked those things, the balance is just wrong with them). I hope my wife likes it, its trigger brifters instead of friction thumbshifters like her old bike, and the pedals are funkier (but I could probably swap those), but its 10 lbs lighter, and rides great, and the old Rock Shox still has some boing to it. I think this is one of the old rockshox that used a polymer spring-shock thing, but its got some adjustments, and on stiff and hard, its not bad at all.

I wonder if she'll like it? (she's gone til tomorrow, then we leave Wednesday for the spring strawberry music festival, where I expect she'll be riding it). I still have to figure out how to mount the fenders on it as its likely to be a wet and muddy strawberry. I'm thinking I can use some kind of clamps on the springer forks, and hang the fender from the brake bridge. the back of the bike has fender lugs already. the fenders are off -my- old stumpjumper, which is now my son's college ratbike. loved riding those old things but they are -so- heavy. strongest bike frame ever made, I do think.

http://lh6.ggpht.com/_JS1yca5KB-0/S_...G_6337.CR2.jpg

trailer Rails 05-23-2010 02:49 PM

Quote:

Originally Posted by Gummee!
fixt

M

Thanks guys, but do you have any idea how much your frame flexes when you climb a hill?

Even Al and carbon frames move quite a bit on every pedal stroke.

Gummee! 05-23-2010 03:08 PM

Quote:

Originally Posted by trailer Rails
Thanks guys, but do you have any idea how much your frame flexes when you climb a hill?

Even Al and carbon frames move quite a bit on every pedal stroke.

Yup. I know how much it flexes. I also know that you're pulling it out of its 'happy spot' and bad things happen when you do that.

M

trailer Rails 05-23-2010 03:16 PM

Quote:

Originally Posted by Gummee!
Yup. I know how much it flexes. I also know that you're pulling it out of its 'happy spot' and bad things happen when you do that.

M

We will see, I have been riding it that way for over 2 years now. I'll let you know when it breaks.

kbasa 05-23-2010 09:08 PM

<iframe src="http://ridewithgps.com/trips/44267/embed" height="500px" width="100%" frameborder="0"></iframe>

What I did yesterday. There's a sort of messed up section by the Altamont Pass, so this overstates the route by about 9 miles. If you mouse over the graph at the bottom, it'll show you where that is on the map. Free, too!

EvilGenius 05-23-2010 09:31 PM

Quote:

Originally Posted by kbasa
<iframe src="http://ridewithgps.com/trips/44267/embed" height="500px" width="100%" frameborder="0"></iframe>

What I did yesterday. There's a sort of messed up section by the Altamont Pass, so this overstates the route by about 9 miles. If you mouse over the graph at the bottom, it'll show you where that is on the map. Free, too!

How long did it take?

kbasa 05-23-2010 09:38 PM

Quote:

Originally Posted by EvilGenius
How long did it take?

Avg. speed was 14.5. We rolled out about 9:10 and got back about 3:50. What's that? 7 hours including SAG stops? (we had 4).

We left next to last and finished FIRST.

slackmeyer 05-23-2010 11:15 PM

Quote:

Originally Posted by kbasa
Avg. speed was 14.5. We rolled out about 9:10 and got back about 3:50. What's that? 7 hours including SAG stops? (we had 4).

We left next to last and finished FIRST.

That's a good average, congrats. The wind musta sucked.

That ride with gps program is great, I've been using it quite a bit lately- mostly for motorcycling, but it's even better for biking, with the elevation chart.

Dave, have you ridden geysers road on a pedal bike? I did that a couple weeks ago, it's a great loop from healdsburg, check it out.

Askel 05-24-2010 04:06 AM

http://www.chequamegon100.com/

Wow, just wow. Less than half the registered riders even took the start line. Still waiting to see the results, but I'd be surprised if half of those who did even finished.

Twelve and half fucking hours for me. It hurt from the start and never let up.

I'm looking forward to not racing for a while.

Bimble 05-24-2010 04:42 AM

Quote:

Originally Posted by Askel
...
Twelve and half fucking hours for me. It hurt from the start and never let up.

I'm looking forward to not racing for a while.

Ouch. I was wondering how recovered you would be for this a week after the Almanzo.

The Jesse James century is the weekend before the Gentlemen's, but I'm going to pass. A week just is not enough time to get my legs back.

Was the course tough?

PMC 05-24-2010 05:52 AM

Quote:

Originally Posted by Askel
http://www.chequamegon100.com/

Wow, just wow. Less than half the registered riders even took the start line. Still waiting to see the results, but I'd be surprised if half of those who did even finished.

Twelve and half fucking hours for me. It hurt from the start and never let up.

I'm looking forward to not racing for a while.

That looked brutal
My buddy Dave pulled out at Rock Lake. His back was totally shot and had smacked his chin on the steerer tube/stem after bouncing off a tree just before OO. He was one of a couple guys on Fargos.

Having ridden most of those trails I'd have to say that would have been the hardest 100 miles I can imagine putting together. Miles and miles and miles and miles of rocky single track. Add in a little rain on the northern leg of it and wow.
The wife of one of the racers who I was chatting with said something like "He has ridden all of these trails before when we've been up on vacation but we did them over the week, not all in one day."

Congrats to all that finished. That was epic

I kept an eye out for you but missed you. I was at the Hatchery, OO and Namakagon but moved on as soon as my two friends were through.


Times are GMT -7.   It's 02:02 PM.

Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2015