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Find the diappearing "Clunk".(7 posts)

Find the diappearing "Clunk".Len J
May 23, 2002 4:36 AM
Last night in the middle of the "Wed night hammerfest" I broke a drive side spoke on the rear wheel of my Rolf Sestraire's. Wheel immediatly went way out of true (High tension, low spoke count wheels) and began rubbing the brake pads. Stupid me didn't notice the broken spoke, felt like I was working much harder than usual, just thought my legs were toast (actually felt better about my fitness when I realized the brake rub). Thankfully, the spoke broke at the nipple, (actually it was the nipple that sheared) and the spoke didn't trash anything else (that I can find).

However, how I did notice this was by a "clunk" sound every time I shifted to a larger rear cog. (Shifting to a smaller cog was no different than normal) Clunk is the only way I can describe it. It appeared to be coming from the area somewhere between the downtube bosses & the BB but I couldn't find the cause. When I got home, I replaced the wheels with another set (but used the same cog), reinstalled the brake pad (That I had removed in order to ride home) and the "Clunk" was gone.

Any idea what this noise was? I can't for the life of me think of what shifting changes would occur with the replacement of a out of true wheel with a true wheel. I was very worried that something was wrong with my rear Der. I went out and rode 7 miles after the replacement of the wheels & had no shifting noise at all. What gives?

Other info. Trek 5500, Shimano D/A double.


Heightened hearing? A question for you...MB1
May 23, 2002 6:24 AM
What are you doing about gearing for the Tour du Montes? I'm running 30/42/52 with a 12-32. I can't imagine you have anything like that living on the shore as you do.

Need to borrow parts?
I'm not sure.Len J
May 23, 2002 6:33 AM
I have a 53/39 front & 12/27 rear that I can put on my Trek that I was hoping to be able to do the tour with. I've been working on strength & speed endurance all spring. I also have a steel lemond with a 30/42/52 that I can throw the 12/27 on. This is the bike I did Alaska with. I can't imagine that the Tour will be harder than Alaska so I know I can get away with this. I would prefer to do it with the double (ego) but I'm worried. BTW the Trek weighs about 5 pounds less than the Lemond.

How long are the hills, What kind of grade? What kind of climbing speed did you do last year?

I'm less worried about the first day than I am the third.



PS Have thought about putting the triple on the Trek. The other option is to put an XTR with a 13/32 on the Trek. All advice welcome.
You will need the gears.MB1
May 23, 2002 6:46 AM
I wouldn't worry too much about the weight of the bike. You will need the gears. The second day has lots of climbs that seem pretty steep to me (I'm not a flatlander either).

If you can do it yourself it might be fun to put the triple on the Trek otherwise bring the Lemond (with the XTR with the 12/32).
Can't offer any help, but how do you like the bike?hrs
May 23, 2002 6:32 AM
How long have you had it, what did you ride before (or still ride in addition to it), what other bikes did you consider?

I'm thinking about getting a 5200/5500 frame and building it up with Campy (just a personal preference), I'm going to try to take one (probably a stock 5500) out for a test ride this weekend. I'm a new rider, is there anything I should pay attention to or look for? Thanks.

Fit.Len J
May 23, 2002 6:42 AM
I had a Lemond B/A with 105 before the Trek. The Trek is a signoificant upgrade. Smooth, responsive, light all day comfortable. Had this for 1.5 years and about 7,000 miles

3 thing to pay attention to:
1.) Fit. Trek's are sized center of BB to top of seattube so a 57 trek equals a 55 or 54 of something else, yet the TT is equivilant (or close). Make sure that you size it correctly & can live with whatever Handlebar drop/spacers/stem length that you end up with.

2.) Feel. Some people complain that the Trek Carbon has a "wooden" feeling. While not the same feel as steel, I don't think it's wooden. It definatly absorbs road buzz better than most.

3.) Colors. I bought mine before the project 1 option. I got the Smole Carbon (Couldn't do the Postal thing) It's only OK the look doesn't thrill me. It's not a big deal, but it is there.

I would recommend that you test ride several bikes including the Trek before you buy. Try to do sequential rides with different materials to see what feels and fits right to you. Here's a good primer on test riding.

Good Luck

Thanks, that link is greathrs
May 23, 2002 9:03 AM
One of the big reasons I'm going with a new bike rather than used is I want to make sure I get a perfect fit. I bought my current bike (late 80's Bianchi) used and though the frame size was right, only recently have I gotten the fit right (and the new handlebars and stem cost almost half what I paid for the bike, though I definitely could have spent a lot less). I haven't ridden carbon fiber before, but like the idea of lots of damping, while maintaining good power transfer and light weight. I've got a test ride planned at the LBS for Saturday and will also be riding a Bianchi XL Boron and a Colnago Master XL. So hopefully that will give me some good comparisons. The color isn't a big deal, but the LBS has some 2001 frames in the white USPS design that would be less expensive than the 2002 frames. The smoke carbon is my first choice and abyss my second, but I'll see what the price difference is.

Again, thanks for the advice and the link.