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Questions about retro parts?(4 posts)

Questions about retro parts?tronracer
Jun 17, 2002 9:01 AM
I have a De Rosa w/ Super record. I took it out on a real ride this weekend to the bicycle coalition, Freedom Valley ride "For the Betterment of Bicycling Everywhere" organized ride.
Two problems: rear derailleur cable and headset.

1) On one of the downhills, reaching speeds of 50 mph, the front seemed a bit wobbly. The wheels are completely and totally true, so I figure it must be the headset. I read on ths forum that the Super record headset had some issues, so I'm wondering if this is one of them.

2) On the last 10 miles of a 70 mile ride, my rear derailleur cable snapped. Do I need a special cable for friction shifters or will dura ace cables work?

Thanks for any input
re: Questions about retro parts?Walter
Jun 17, 2002 10:09 AM
Any cable from the cheapest to the most expensive will work with your rear der. My S. Record is currently being pulled/pushed by a Shimano SIS cable which replaced a no-namer I bought at Sports Authority b/c my LBS isn't very local. They worked about the same.

I agree that the headset is the place to look. I'm not familiar with any S. Record "issues" but others may be. Fla is pretty flat so my headset will not see 50mph unless the bike is in a car rack. Do the basics. Check/lube bearings and make sure there's no play.

Your rims are true but are your hub bearings loose. Probably not but if you haven't looked give them a once over
Spirito will know, Spirito knows everything......tronracer
Jun 18, 2002 4:43 AM
The cables I had did work with my shifters. Oh my gosh, it was soooooo easy to set up, I love it(friction rules). The old cables had a little "c" on the nipple. Original Campagnolo?

I relubed the hubs and tightened the cone all the way, then backed it out an eighth of a turn, checked the trueness and dish of the wheel, both okay! The headset is as smooth as could be. However, the tire seems to wobble even though the rims are as true as true can be. That might have something to do with the instability at high speeds. I don't know. The headset isn't pitted and didn't seem loose. What else could it be? Possibly the tires? They are worn out almost, and I think they were cheap to begin with? Thoughts?
Head wobble is not unusual ...Humma Hah
Jun 18, 2002 3:31 PM
... do check the condition and adjustment of the headset, but most bikes will wobble at certain speeds.

Wheel balance could be the culprit. A couple of years back, one contributor here reported a nasty wobble that went away when he moved his cyclocomputer wheel magnet. He'd put it on the same side as the valve, and when he moved it to the other side the wobble went away.

Frame flex is usually part of the problem. Try pinching the top tube between your knees, and/or pinching the nose of the saddle between your thighs.