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


Go Back   > >

Touring Have a dream to ride a bike across your state, across the country, or around the world? Self-contained or fully supported? Trade ideas, adventures, and more in our bicycle touring forum.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 11-16-10, 02:18 PM   #1
VintageRide
Senior Member
Thread Starter
 
VintageRide's Avatar
 
Join Date: Jul 2008
Location: Burnaby,B.C., Canada
Bikes: 1952 Urago " Tour De France ",late '50's/early '60's P. Peschi: Early '70's Chrome Garlatti ; 1981 Fuji S12S 650b conversion : 1985 Apollo/Kuwahara Sierra Grande: 2013 Rawland Stag 650b
Posts: 464
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 11 Post(s)
Rim choice for light touring

Well, I should say just riding around the city, maybe 100 miles maximum. I will be building up a Steelwool Tweed this winter and bought a set of Hope Pro 3 hubs (36H) which I wanted to use, laced to Mavic CXP33 rims. I read a lot of pros and cons about these rims for loaded touring but since I only weigh 140 and will not carry more than 20 lbs. on a good day, it appears they should be sufficient. I would like to put some Panaracer Pasela 700 x 35 tires on the CXP33 rim, is that workable? Would they be alright for hard packed trails and crushed gravel or are there other tires that are more suited? I'm trying to set it up for comfortable riding on the road traveling at a reasonable speed but some off road as well. I also read that you need to use long stem valves as they are an aero rim, any recommendations on a tube?

Last edited by VintageRide; 11-16-10 at 03:19 PM.
VintageRide is offline   Reply With Quote
Old 11-16-10, 06:13 PM   #2
reptilezs
Senior Member
 
Join Date: Sep 2004
Location: boston, ma
Bikes:
Posts: 2,852
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
all tubes are about the same quality. if riding on hard packed trails with the smooth treaded tire i would not corner aggressively
reptilezs is offline   Reply With Quote
Old 11-16-10, 06:19 PM   #3
sstorkel
Senior Member
 
Join Date: Apr 2008
Bikes: Cervelo RS, Specialized Stumpjumper FSR Pro, Schwinn Typhoon, Nashbar touring, custom steel MTB
Posts: 5,427
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Mavic recommends a tire width of 19-28mm for the CXP33. 700x35 sounds like an awfully large tire to try to squeeze onto a rim that narrow, though I'm sure it can be done. Given the 23mm rim depth, you'll probably want a tube with a valve stem that's at least 48mm long. That should give you about an inch of valve stem protruding above the rim. Performance Bike makes the Presta version of their Forte tubes in that length. Dunno about anyone else; seems like there isn't a bit demand for touring-sized tires on deep rims...

If I were you, I'd buy a wider rim if I wanted to use 700x35 tires. I've been very happy with the wheels I built using the Velocity Synergy rim.
sstorkel is offline   Reply With Quote
Old 11-16-10, 06:21 PM   #4
NoReg
Banned
 
Join Date: Aug 2005
Bikes:
Posts: 5,117
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
They sound fairly strong. I had difficulty finding any reference to their being available in 36 hole and able to match your hubs.

I don't really see the point to these rims. Why do you want an aero racing rim for a comfort touring use. Aero goes up to the square of speed, so if a racer was doing 20 to your (aggressive) 14, his aero drag would be nearly twice yours. I average 10. so that is a quarter the drag, I use fenders, there is a ton to optimise there and bags..There is a huge amount you can do to streamline the body, while the rims are a fairly small part of it. Doesn't sound like these rims would collapse.
NoReg is offline   Reply With Quote
Old 11-16-10, 07:14 PM   #5
rekmeyata
Senior Member
 
rekmeyata's Avatar
 
Join Date: Sep 2010
Bikes:
Posts: 7,906
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 257 Post(s)
You cannot go to a 35 on that rim. Mavic recommends nothing larger then 28, and that is the true upper limit.

but that doesn't mean you can't do light touring as your wanting to do with 28's. 28's and those rims can easily handle 220 pounds, and your only going to have 160 to maybe 170 if you use a loaded handlebar bag and a seat bag.

I wouldn't use Forte tires or tubes if you paid me!! Your best tubes are Conti's or Specialized, personally I like Mich Latex because they provide a plusher ride over butyl, but you will need to put air in every day to the tune of about 20 pounds. However it's true that most tubes are made by one manufacture in Taiwan but their made according to each companies specs.

Tire wise, Specialized Armadillo All Condition tire has a fantastic 28 size tire that is very robust in both flat protection and wear.
rekmeyata is offline   Reply With Quote
Old 11-16-10, 07:41 PM   #6
fietsbob 
coprolite
 
fietsbob's Avatar
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Bikes: 7
Posts: 20,460
Mentioned: 11 Post(s)
Tagged: 0 Thread(s)
Quoted: 661 Post(s)
CXP 33 gets used for Cyclo cross racing , should be OK,
they run 32~34 tires often, then . at lower pressures.

I have old stuff.. Mavic Mod 3, with 33,3 jack brown slicks .. on one bike,

Wolber 58 with 32 Schwalbe Marathon Plus, a really robust puncture resistant tire
on another ..

Last edited by fietsbob; 11-16-10 at 07:47 PM.
fietsbob is online now   Reply With Quote
Old 11-16-10, 07:45 PM   #7
VintageRide
Senior Member
Thread Starter
 
VintageRide's Avatar
 
Join Date: Jul 2008
Location: Burnaby,B.C., Canada
Bikes: 1952 Urago " Tour De France ",late '50's/early '60's P. Peschi: Early '70's Chrome Garlatti ; 1981 Fuji S12S 650b conversion : 1985 Apollo/Kuwahara Sierra Grande: 2013 Rawland Stag 650b
Posts: 464
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 11 Post(s)
I should mention that I got the wheel set for a very good price, brand new. I was not specifically looking for an aero rim. Seems the CXP33s are a mixed bag. Some say they are strong, others disagree. For loaded touring I would not but in light of my intended use I'm sure I could do worse. I know many use wider tires than the rim manufacturer specifies. I did look at the Sheldon Brown site and the chart he uses. Seems 32 would be the upper limit given a 15mm ( I think ) inside diameter but he mentions the chart errs on the side of caution. Of course, I'm not set on having to use a 35 tire, my inexperience tells me they would be better for a mix of hard packed trail and gravel roads, as well as pavement. All of this relates to my XC riding on 2.0 wide 26" rims. If there is a comfortable riding 28 I would try a pair. I really want to reduce road shock from bumps, cracks etc. Silly me, I like the Hope hubs so much that the rims were secondary. When I think of the wide tires I put on the 26" Mavic XM 719 it seems as though a 35 would not cause a problem.

Last edited by VintageRide; 11-16-10 at 08:16 PM.
VintageRide is offline   Reply With Quote
Old 11-16-10, 08:13 PM   #8
fietsbob 
coprolite
 
fietsbob's Avatar
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Bikes: 7
Posts: 20,460
Mentioned: 11 Post(s)
Tagged: 0 Thread(s)
Quoted: 661 Post(s)
Before Bontrager became a Trek Corp Brand name, and was a bike guy with a garage shop,
he cut down 40 spoke Mavic road rims to be 32 hole mountain bike wheels
to make a skinny light rim for mountain bike racers..

hard and fast rules of thumb are more .. like opinions.
fietsbob is online now   Reply With Quote
Old 11-16-10, 09:22 PM   #9
ullearn
Senior Member
 
ullearn's Avatar
 
Join Date: Mar 2010
Location: TX
Bikes: Homemade Custom Tourer, EPX 303, Schwinn Homegrown, Trek 7.3 FX, Robinson SST, Trek Fuel EX7
Posts: 122
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by VintageRide View Post
riding around the city, maybe 100 miles maximum..... I only weigh 140 and will not carry more than 20 lbs. on a good day
I think with description you can pretty much ride whatever you like, all the way to ultra light racing bikes, they can handle this.
ullearn is offline   Reply With Quote
Old 11-17-10, 12:21 AM   #10
zzzwillzzz
shut up and ride
 
Join Date: Nov 2005
Location: noho
Bikes: supersix hi-mod,burley duet tandem,woodrup track,cannondale cross,specialized road
Posts: 1,947
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
i've run everything from 23s to 45s on a bunch of mavic rims that are all the same width as the cxp33 without any problems
zzzwillzzz is offline   Reply With Quote
Old 11-17-10, 09:48 AM   #11
positron
Senior Member
 
Join Date: Mar 2007
Bikes:
Posts: 1,273
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
yep, no problem with the tire size on that rim.

the rim is strong too. I abused the hell out of one for a couple years with no issues.
positron is offline   Reply With Quote
Old 11-17-10, 10:25 AM   #12
sstorkel
Senior Member
 
Join Date: Apr 2008
Bikes: Cervelo RS, Specialized Stumpjumper FSR Pro, Schwinn Typhoon, Nashbar touring, custom steel MTB
Posts: 5,427
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Quote:
Originally Posted by VintageRide View Post
If there is a comfortable riding 28 I would try a pair.
In my experience a 700x28 isn't any more comfortable than a 700x25. If you're planning to ride gravel roads, the smallest tire I'd consider would be 700x32. The 700x35 that you're planning to use is probably ideal... provided it will stay on the rim!
sstorkel is offline   Reply With Quote
Old 11-17-10, 02:17 PM   #13
LeeG
Senior Member
 
Join Date: Sep 2008
Bikes:
Posts: 4,693
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Quote:
Originally Posted by fietsbob View Post
Before Bontrager became a Trek Corp Brand name, and was a bike guy with a garage shop,
he cut down 40 spoke Mavic road rims to be 32 hole mountain bike wheels
to make a skinny light rim for mountain bike racers..

hard and fast rules of thumb are more .. like opinions.
I remember those.
LeeG is offline   Reply With Quote
Old 11-17-10, 05:32 PM   #14
rekmeyata
Senior Member
 
rekmeyata's Avatar
 
Join Date: Sep 2010
Bikes:
Posts: 7,906
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 257 Post(s)
Sun has made a recommendation of tire width for what they feel is safe for that rim. You may be able to put a 32 on it but it's not recommended because your pushing the edge, but anything beyond 32 is asking for trouble. Go to this web site and check out the rim chart: http://www.sheldonbrown.com/tire-sizing.html Keep in mind this chart is conservative just as Suns recommendations are, but they do that for safety. Another way to look at it is by a mathematical rule of thumb for tire sizing is 1.8-2.2 times your rim width

Note, that just as Sun, the Chart recommends nothing more then two sizes under and two sizes over of the middle size; again you could go an additional one size, but should not go more then that.

If you want to squeeze a 45 onto rim with a max size rating of 28 then you do so at your own risk, I am not recommending you do that under any circumstance. And a 35? Well some manufactures 35 may be closer to 32 then a true 35 and those will fit, but so what? you still have a 32 it's just marked 35.
rekmeyata 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 04:06 PM.