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


Go Back   > >

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 05-16-09, 08:02 PM   #1
uoficowboy
Senior Member
Thread Starter
 
Join Date: Sep 2008
Location: San Jose, CA
Bikes: 2007 Jamis aurora
Posts: 85
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
is a Ritchey stem plate compatible with anything else?

Hi there - I have a Ritchey stem. Looks a lot like this one: http://www.ritcheylogic.com/dyn_prodfamily.php?k=98293

It's a stock part on my 2007 Jamis Aurora. I believe it's a 1 inch part.

I want to get a Hope Vision stem plate for it. One of these: http://www.chainreactioncycles.com/M...?ModelID=15564

They only make them for FSA, Hope, and Thompson stems. Does anybody know if one of these would be compatible with the Ritchey part?

Thanks!
uoficowboy is offline   Reply With Quote
Old 05-17-09, 10:37 AM   #2
DMF 
Elitist Troglodyte
 
DMF's Avatar
 
Join Date: Jun 2006
Location: Dallas
Bikes: 03 Raleigh Professional (steel)
Posts: 6,924
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
You have a choice:

1) Believe what the manufacturer says.

2) Get one and find out.
__________________
Stupidity got us into this mess - why can't it get us out?

- Will Rogers
DMF is offline   Reply With Quote
Old 05-17-09, 12:18 PM   #3
operator
cab horn
 
Join Date: Jun 2004
Location: Toronto
Bikes: 1987 Bianchi Campione
Posts: 28,306
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by uoficowboy View Post
Hi there - I have a Ritchey stem. Looks a lot like this one: http://www.ritcheylogic.com/dyn_prodfamily.php?k=98293

It's a stock part on my 2007 Jamis Aurora. I believe it's a 1 inch part.

I want to get a Hope Vision stem plate for it. One of these: http://www.chainreactioncycles.com/M...?ModelID=15564

They only make them for FSA, Hope, and Thompson stems. Does anybody know if one of these would be compatible with the Ritchey part?

Thanks!
If i'm not mistaken, the aurora comes with 26.0 bars with the ritchey adjustable stem. That hope stem plate is listed for 31.8. If it does work, you'll at least be needing a 26.0 -> 31.8 shim on the new faceplate side. If you can understand why they make 3 different faceplates for the exact same 3.18 clamp diameter then you'll also know if it would, or would not work with your stock aurora stem. I don't. Maybe someone else on here does.
operator is offline   Reply With Quote
Old 05-17-09, 01:26 PM   #4
uoficowboy
Senior Member
Thread Starter
 
Join Date: Sep 2008
Location: San Jose, CA
Bikes: 2007 Jamis aurora
Posts: 85
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Quote:
Originally Posted by operator View Post
If i'm not mistaken, the aurora comes with 26.0 bars with the ritchey adjustable stem. That hope stem plate is listed for 31.8. If it does work, you'll at least be needing a 26.0 -> 31.8 shim on the new faceplate side. If you can understand why they make 3 different faceplates for the exact same 3.18 clamp diameter then you'll also know if it would, or would not work with your stock aurora stem. I don't. Maybe someone else on here does.
Hi - on that page they list both 31.8 and 25.4mm bars - so I'm assuming I want the 25.4mm ones...

I'm assuming the differences between the manufacturers is hole placement? I have no idea though...
uoficowboy is offline   Reply With Quote
Old 05-17-09, 01:27 PM   #5
uoficowboy
Senior Member
Thread Starter
 
Join Date: Sep 2008
Location: San Jose, CA
Bikes: 2007 Jamis aurora
Posts: 85
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Quote:
Originally Posted by DMF View Post
You have a choice:

1) Believe what the manufacturer says.

2) Get one and find out.
But which would I buy? They have plates for three different manufacturers...

I'm thinking I might stop buy a local shop and see if I can do a comparison there. Not sure how happy they'll be to help being that they probably don't sell the part...
uoficowboy is offline   Reply With Quote
Old 05-17-09, 01:40 PM   #6
zzyzx_xyzzy
headtube.
 
zzyzx_xyzzy's Avatar
 
Join Date: Sep 2008
Bikes:
Posts: 804
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Hole placement and size. Don't put a 25.4 faceplace on a 26.0 bar, you'll damage the bar.
zzyzx_xyzzy is offline   Reply With Quote
Old 05-17-09, 04:36 PM   #7
operator
cab horn
 
Join Date: Jun 2004
Location: Toronto
Bikes: 1987 Bianchi Campione
Posts: 28,306
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by uoficowboy View Post
Hi - on that page they list both 31.8 and 25.4mm bars - so I'm assuming I want the 25.4mm ones...

I'm assuming the differences between the manufacturers is hole placement? I have no idea though...
No, I specifically said 31.8 because you cannot use the 25.4 on a 26.0 bar.
operator is offline   Reply With Quote
Old 05-17-09, 05:35 PM   #8
uoficowboy
Senior Member
Thread Starter
 
Join Date: Sep 2008
Location: San Jose, CA
Bikes: 2007 Jamis aurora
Posts: 85
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Quote:
Originally Posted by operator View Post
No, I specifically said 31.8 because you cannot use the 25.4 on a 26.0 bar.
Wow - I had assumed the 25.4 vs 26 thing was some rounding thing or something. It's insane that they'd make two sizes so close to each other. Is there a good way to confirm which I have? Do I just measure the diameter at the point that the stem connects to the handlebars?
uoficowboy is offline   Reply With Quote
Old 05-17-09, 06:01 PM   #9
operator
cab horn
 
Join Date: Jun 2004
Location: Toronto
Bikes: 1987 Bianchi Campione
Posts: 28,306
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by uoficowboy View Post
Wow - I had assumed the 25.4 vs 26 thing was some rounding thing or something. It's insane that they'd make two sizes so close to each other. Is there a good way to confirm which I have? Do I just measure the diameter at the point that the stem connects to the handlebars?
We carry the specific model you're riding - money back gaurantee it's 26.0 unless someone has swapped out the stock parts. Measure the clamp area of the handlebar if you want to make sure yourself - with a set of good calipers.
operator is offline   Reply With Quote
Old 05-18-09, 11:55 AM   #10
Camilo
Senior Member
 
Join Date: Apr 2007
Bikes:
Posts: 4,263
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 111 Post(s)
Quote:
Originally Posted by uoficowboy View Post
Wow - I had assumed the 25.4 vs 26 thing was some rounding thing or something. It's insane that they'd make two sizes so close to each other. Is there a good way to confirm which I have? Do I just measure the diameter at the point that the stem connects to the handlebars?
Yes that's how you'd measure it, but you'll need a measuring caliper and know how to use it to get an accurate measurement if your question is really between 25.4 and 26.0 (that's less than 1/32 inch). I don't believe you'd be able to tell the difference by eyeballing it with a ruler.

But the difference between 26.0 and 31.8 is obvious.

As for why.... I think it may be that 25.4, being a MTB standard was established in the US because it's exactly 1 inch. I have no idea why the road bike standard was/is 26.0.

As for 31.8 (which is actually 31.75 and is sometimes called 31.7), that's exactly 1 1/4 inch.
Camilo is offline   Reply With Quote
Old 05-18-09, 12:43 PM   #11
DannoXYZ 
Senior Member
 
DannoXYZ's Avatar
 
Join Date: Jul 2005
Location: Saratoga, CA
Bikes:
Posts: 11,606
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Quote:
Originally Posted by Camilo View Post
s for why.... I think it may be that 25.4, being a MTB standard was established in the US because it's exactly 1 inch. I have no idea why the road bike standard was/is 26.0.
The 26.0+ size was used on European bikes for the longest time. Only low-end road bikes in the U.S. used 25.4mm and typically only low-end bars like SR came in 25.4mm. The nicer bars and stems like Nitto, 3T, Cinelli used 26.0 and some others like Modolo used 26.6.
DannoXYZ is offline   Reply With Quote
Old 05-19-09, 03:57 PM   #12
uoficowboy
Senior Member
Thread Starter
 
Join Date: Sep 2008
Location: San Jose, CA
Bikes: 2007 Jamis aurora
Posts: 85
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Quote:
Originally Posted by operator View Post
We carry the specific model you're riding - money back gaurantee it's 26.0 unless someone has swapped out the stock parts. Measure the clamp area of the handlebar if you want to make sure yourself - with a set of good calipers.
Hi - I checked today and it measures at 25.95. I then called up Hope (and man was their website hard to find... www.hopetech.com for anybody looking) and they confirmed that they don't make a 26mm stem plate and also they were fairly sure that the Ritchey stem would not be compatible with any of them.

I then called up Ritchey (who's number was quite well hidden) and they told me that they were positive that none of those stem plates would work. So damn. I think I'm screwed.
uoficowboy 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 05:55 PM.