|Board Technomeisters: How straight is straight?||12x23|
Oct 14, 2002 4:34 PM
|I've purchased several frames over the last 15 years and have only had a couple of problems, both easily resolved with the manufacturer. I just purchased a new ti frame and discovered the rear triangle off a bit when I started the build. I returned it to the bike shop who returned it to the manufacturer. I promptly received a replacement. No problem except the replacement is off, although a bit less. The problem is the same. When I place a wheel in the frame it is off center nearer the drive side by about 3mm. The brake bridge appears "off a bit" where tigged between the seatstays. To eliminate wheel dish as the culprit I tried several wheels, all which appear perfect in a couple of other bikes, with the same result.
The shop and manufacturer were excellent in dealing with the first frame. I hate to go back, but all I am asking for is a straight frame. Am I taking this thing a little too far .., to the right?
Thanks in advance.
|re: Board Technomeisters: How straight is straight?||divve|
Oct 14, 2002 5:22 PM
|In my opinion 3mm is a lot. Don't quote me on this, but I thought 1/10mm tolerance was pretty standard for quality manufacturers.|
|Both frames are off!||Kerry|
Oct 14, 2002 5:25 PM
|There's no way a properly dished wheel should be that far off center. Just to check and be 100% sure, flip the wheel around (cogs on the left). With a straight frame and properly dished wheel, the rim will be centered between the dropouts regardless of which way it is in the frame. Want to share what brand/model of frame this is?|
|Both frames are off!||12x23|
Oct 14, 2002 6:11 PM
|Thanks, Kerry. I'd prefer to contact the shop and manufacturer before I say who, as I haven't spoken with them yet. I just got home, pulled the XXXXXX out of the box, and got a little upset when I inserted four wheels in the frame (two custom tubbies, a Ksyrium, a D/A WH7701, all that I know to be properly dished) and all were off roughly the same.
I wanted a little advice before I sent it back .., wanted to be sure I wasn't off base, although I sure didn't think I was. My new bike experience has worn off before I've as much as screwed the bottom bracket in.
Oct 14, 2002 7:37 PM
|The shop is claiming it is wheel dish with my bike... never had a problem on my old frame. I'm not buying it, but I'm down to one wheelset... never thought about flipping the wheel.|
|manufacturer's name please.....||Bruno S|
Oct 14, 2002 6:47 PM
|How doing this? big company loosing quality control? small company without the proper controls? Interested because I am planning on purchasing a new frame next year.|
|re: Board Technomeisters: How straight is straight?||MrCrud|
Oct 14, 2002 9:06 PM
What happened to you is not extremey common, but i see it every once in awhile. It can get pretty difficult to get a rear triangle absolutely straight. Especially with materials such as Ti. 3mm is a bit much though. Just send them back the frame, and if they're any good, they'll be glad to swap it for another.
Most frames arent straight. It just depends on how good your measuring tools are. This is why older steel frames have adjustable rear drop-outs.
|What is the cause of this?||fbg111|
Oct 15, 2002 4:12 AM
|Mismeasured tubing? Different welding on different sides? Would a carbon monocoque bike be, on average, less susceptible to such a manufacturing issue?|
|Couple of thoughts.||Len J|
Oct 15, 2002 4:15 AM
|1.) Do you trust the LBS? If so, have tyhis discussion with him, he may have another way to test alignment.
2.) Did you check your wheels for dish with a dishing tool? I have a buddy that swore his truing stand was perfect, until somone told him to check the dish, found out it was off a little.
3.) Try reversing the wheel & see if the mis alignment changes side to side.
4.) Is it possible they "adjusted" the first frame & sent it back to you? If you decide to send it back, mark it discretely somewhere on the frame.
5.) I wouldn't wait to find out that the bike mis handles if I were you. I'd go back to the shop.
I can only imagine how you felt when you got it home & discovered it might be out of alignment again. Really ruins the pleasure of a new bike.