Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Cyclocross Racing Discuss pro racing, the big races, and even the small backyard races. Don't forget to update all the members with your own race results.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 10-21-09, 01:02 PM   #1
jwible
Draught
Thread Starter
 
jwible's Avatar
 
Join Date: Jul 2005
Location: Georgia
Bikes: N-1 where N = number needed
Posts: 4,050
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Powertap in a race?

I've got some nice fresh Psimet wheels coming tomorrow with a powertap SL+ in the rear. The builds are certainly strong enough for CX, but is the PT rear hub up to the task? I'm thinking it is, but what are the risks of using it in a harsh environment?

My alternate wheelset is a set of Mavic Ksyrium Elites.

I'd really like to get race data as it would be the ultimate baseline for where I am in my training (not very far) but I don't want to risk killing the electronics either.

JW
jwible is offline   Reply With Quote
Old 10-21-09, 01:50 PM   #2
ridethatbike
In the top 42%
 
ridethatbike's Avatar
 
Join Date: Jul 2009
Location: Kansas
Bikes: Salsa CCC
Posts: 220
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
If you wouldn't mind buying another powertap sl+, then sure, race with it.

I agree with your methodology, but that's pretty expensive race gear.
ridethatbike is offline   Reply With Quote
Old 10-21-09, 02:08 PM   #3
funurdiesel
Senior Member
 
Join Date: Feb 2009
Bikes:
Posts: 108
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I raced once with my powertap and it survived fine on a dry but brutally bumpy course. I didn't find the data too useful to I haven't used it again. I've seen other guys race with them and they seem fine.
Personally, I wouldn't use mine on a wet, muddy course for fear of killing it but on a dry course I think it would be ok.
funurdiesel is offline   Reply With Quote
Old 10-21-09, 03:25 PM   #4
jonestr
Senior Member
 
Join Date: Jul 2008
Location: ABQ, NM
Bikes: Neuvation F100, Surly Cross Check, Van Dessel Holeshot
Posts: 1,152
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
you can get a speed sensor for it and run your regular wheels, and then you can infer TSS and what not to keep your CTL and ATL accurate
jonestr is offline   Reply With Quote
Old 10-21-09, 06:13 PM   #5
nitropowered
Senior Member
 
Join Date: Dec 2004
Location: Athens, Ohio
Bikes: Custom Custom Custom
Posts: 5,104
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
IF and TSS gets all screwed up if you do any running so its hard to do meaningful analysis unless you are really good at it.
nitropowered is offline   Reply With Quote
Old 10-21-09, 06:43 PM   #6
marsh283
Senior Member
 
marsh283's Avatar
 
Join Date: Jan 2009
Location: EL, MI
Bikes:
Posts: 133
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by fatroadie View Post
If you wouldn't mind buying another powertap sl+, then sure, race with it.

I agree with your methodology, but that's pretty expensive race gear.
To be honest, in the event of a crash, the hub will be the last thing to fail, especially the PT which is a pretty solid hub. The newer hubs are also fairly waterproof and can handle mud pretty well. Just remember, Saris also makes a MTB disc Powertap, so these things can take somewhat of a beating.
I've raced on mine and have never had a problem, the data is nice to look at but dont be hard on yourself if the numbers are lower, lots of zeros and softpedaling through turns/technical sections. I dont race anymore on it because I use tubulars but if i had a PT laced to a tubular wheel you bet I would
marsh283 is offline   Reply With Quote
Old 10-21-09, 06:50 PM   #7
jonestr
Senior Member
 
Join Date: Jul 2008
Location: ABQ, NM
Bikes: Neuvation F100, Surly Cross Check, Van Dessel Holeshot
Posts: 1,152
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by nitropowered View Post
IF and TSS gets all screwed up if you do any running so its hard to do meaningful analysis unless you are really good at it.
That is true, but the more workouts you can put in there the better. I guess it depends on how much you are running for cross. I dont do much at all so it doesent really effect me all that much.
jonestr is offline   Reply With Quote
Old 10-21-09, 07:29 PM   #8
jwible
Draught
Thread Starter
 
jwible's Avatar
 
Join Date: Jul 2005
Location: Georgia
Bikes: N-1 where N = number needed
Posts: 4,050
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Good points on the running. I've got a Garmin 7-5 I'll be using for the head unit so I can at least collect HR, speed, cadence, etc. if I don't run it. Considering the race is on Halloween and the only components I have together now are the frame and seatpost I think I may just run the Ksyriums and keep the Psimet wheels on the Storck until I get a feel for how brutal CX is around here.
jwible is offline   Reply With Quote
Old 10-21-09, 07:55 PM   #9
nitropowered
Senior Member
 
Join Date: Dec 2004
Location: Athens, Ohio
Bikes: Custom Custom Custom
Posts: 5,104
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I have a Quarq and I just manually adjust the TSS to 100 for the hour of racing.
nitropowered is offline   Reply With Quote
Old 10-22-09, 06:44 PM   #10
OnTheRivet
Senior Member
 
Join Date: May 2008
Bikes:
Posts: 139
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
What logical reason would there be for using a power measuring device in cyclocross?
OnTheRivet is offline   Reply With Quote
Old 10-22-09, 07:03 PM   #11
ridethatbike
In the top 42%
 
ridethatbike's Avatar
 
Join Date: Jul 2009
Location: Kansas
Bikes: Salsa CCC
Posts: 220
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by jwible View Post
Good points on the running. I've got a Garmin 7-5 I'll be using for the head unit so I can at least collect HR, speed, cadence, etc. if I don't run it. Considering the race is on Halloween and the only components I have together now are the frame and seatpost I think I may just run the Ksyriums and keep the Psimet wheels on the Storck until I get a feel for how brutal CX is around here.
Holy crap, you're going to be busy.
ridethatbike is offline   Reply With Quote
Old 10-23-09, 06:38 AM   #12
jwible
Draught
Thread Starter
 
jwible's Avatar
 
Join Date: Jul 2005
Location: Georgia
Bikes: N-1 where N = number needed
Posts: 4,050
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by fatroadie View Post
Holy crap, you're going to be busy.
Well the derailleurs and shifters are on. Still no headset, bb, tires, crank, brakes. It'll only take a couple of hours once the parts are all here.
jwible is offline   Reply With Quote
Old 10-23-09, 07:48 AM   #13
ridethatbike
In the top 42%
 
ridethatbike's Avatar
 
Join Date: Jul 2009
Location: Kansas
Bikes: Salsa CCC
Posts: 220
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
It always takes me awhile to get the bike just how I like it. I've had my Salsa for a couple of months now and I'm still tinkering.
ridethatbike is offline   Reply With Quote
Old 10-23-09, 10:46 AM   #14
jwible
Draught
Thread Starter
 
jwible's Avatar
 
Join Date: Jul 2005
Location: Georgia
Bikes: N-1 where N = number needed
Posts: 4,050
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
As long as it shifts and everything is torqued OK it should be raceable. I'm going to transfer settings from my road bike for seat height and reach as best I can and go from there.
jwible is offline   Reply With Quote
Old 10-27-09, 12:25 PM   #15
jwible
Draught
Thread Starter
 
jwible's Avatar
 
Join Date: Jul 2005
Location: Georgia
Bikes: N-1 where N = number needed
Posts: 4,050
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Saris says no problem CXing their hubs. No warranty issues at all.
jwible is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 11:45 PM.