I bought this bike used about 6-7 years ago and after a 5 year hiatus, I dusted it of today and went for short stroll. Unfortunately, it will not downshift the sprocket. The crank works though, so I'm basically down to a 3-speed. Any idea what year this bike was made ?
I forgot what I paid for it. Everyhing on it says Shimano RSX and the frame has CR-MO 4130 on it, whatever that means. The wheels are 700 x 23c. I've tried searching the internet and can't find any information on this bike. When I search for GT Force, all I get are mountain bikes. How much is this thing worth? Is it considered any good? Thanks.
Last edited by JohnnyGalaga; 07-19-09 at 06:37 PM.
First analyze the concept of a 'bicycle.' It is actually a frame & fork with a collection of components that are supposed to work in harmony with the frame & fork. Now this bicycle has been sitting around for 5 years. And you're having difficulty with the rear-derailleur (RD) not shifting. And I'm not surprised.
During long-term storage, the grease and oil and dirt and grime can form something that works best as a glue - not a lubricant. So I would suggest a thorough cleaning of both front and rear derailleurs. WD-40 will work well for dislodging grime - just don't use it as a lube. As the cable-housing has likely become internally affected by the grime - get new housing. And new cables as well. The brake-cables look good from here, but I'd replace them as well - to be safe. Once both derailleurs are clean, add one drop of good oil to every moving part - bolts, pivots, springs, etc. Then replace the cables and housing. Here are instructions for doing the adjustment on these components:
It felt pretty smooth when I rode it today and I was able to upshift the rear derailleur but then I couldn't shift back down. It sure was a heck of a lot faster than my 40+ pound Diamondback Outlook with 26" x 1.95" Armadillos that I often commute on. LOL.
It's a late-90s, back when GT was a good brand. Lube the derailleur cable and adjust it up, it should be fine. RSX stuff was about the same level as Sora is now, I think. Not fancy but perfectly functional. It's probably not worth a lot, simply because of its age and old componentry.