laknathdias

I'm trying to restore a Trek 930 as my main commuter bike. I bought it from a yard sale for 50 bucks. Following are some things I need to get it to running condition, and I was hoping to get some suggestions.

1. The original head set (aheadset brand) seems to be in bad condition. What is a good replacement headset, and what size would fit this bike?
2. I was hoping to convert it into a sealed bottom bracket. Any suggestions on the parts I could use?
3. The original breaks and shifters are missing. Any suggestions for a set of thumb shifters I can use?

katsup

1. 1 and 1/8" is your stem size. You can research headsets from this.
2. A cartridge or sealed? what you have is probably sealed. You'll likely need a 73 cartridge body, but you'll need to measure the spindle you have. It is probably a 122.5 or 127.
3. Deore XT M732 Thumb shifters (check eBay). If you want a modern shifter / brake lever, look at the Shimano EF500 or EF51, but make sure you get the cantilever version (if that is the type of brake you are running). They have a V-Brake only version of these shifters, do not get those.

laknathdias

Thanks. Yes, I was hoping to put a cartridge one

Quick follow up. The bike has an Exage 500LX M500 crank set. I was able to remove everything except the fixed cup. Would the Partk Tool HCW-4 tool fit ?

madpogue 

Are the brakes missing? Or the brake levers?

What exactly is "bad" about the headset? Unless it's been outside a lot, and/or hammered on hard without maintenance of the grease, it may just need to be repacked.

brian3069

Sheldon Brown explains how to make a tool for removing fixed cups. Sometimes they can be a real mother to break loose, it may be worth paying a shop a few dollars to remove it.

https://sheldonbrown.com/tooltips/bbcups.html

bikemig 

If the cups and spindle are in good shape, there is no need to replace the bottom bracket. Most of the old school triples I've worked on take a 127 mm bottom bracket as the new sealed units are symmetrical. Shimano does not make a 127 mm 73 mm bottom bracket. Measure it but I do believe @katsup is right and you need a 73 mm BB and a 1 and 1/8 headset (certainly that is true for my '92 Trek 950).

Although Shimano does not make a 127 73 mm BB, sunlite does and you can find one on ebay. https://www.ebay.com/p/Sunlite-Botto...50984534&rt=nc Measure the old spindle first but remember you are going from an asymmetrical to a symmetrical BB spindle.

If you don't mind friction shifters, sunrace makes cheap very decent thumbies.

https://www.amazon.com/Sunrace-SLM10-Friction-Shifter-Set/dp/B007QMJH86/ref=asc_df_B007QMJH86/?tag=hyprod-20&linkCode=df0&hvadid=312144750238&hvpos=1o2&hvnetw=g&hvrand=10755852032321387108&hvpone=&hvptwo=&h vqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9017954&hvtargid=aud-801657747996la-524340701881&psc=1

It's hit or miss finding 7 speed used thumbies. Personally I'd avoid the push push shifters. I don't like them but YMMV.

https://www.amazon.com/Shimano-3X7-Speed-Brake-Shift-Lever/dp/B00NGDRVKA/ref=asc_df_B00NGDRVKA/?tag=hyprod-20&linkCode=df0&hvadid=312035432333&hvpos=1o4&hvnetw=g&hvrand=10335749073053057287&hvpone=&hvptwo=&h vqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9017954&hvtargid=aud-801657747996la-568354099886&psc=1

Tektro CR 270s are excellent replacement cantilevers. You should be able to find decent used cantilevers for less $.