1984 Murray X12 37x590wheel 22" frame .. restore?

Road bikes sold by bygbox stores.
Forum rules
Be polite and courteous! Stay on topic!

Re: 1984 Murray X12 590x34 22" frame .. restore?

Postby Falkon45 » Thu Jan 08, 2015 5:26 pm

If it's not that important to you, wally world has a cable and shifter kit for $4 or $5 bucks. A lot of your shifter cable is exposed on that bike. The brake cables may benefit more from the jag wire kit, but you'll be using a lot of the small shroud to cover your shifter cables.
Falkon45
 
Posts: 1905
Joined: Mon Jan 07, 2013 3:22 am

Re: 1984 Murray X12 590x34 22" frame .. restore?

Postby Tomcat65 » Thu Jan 08, 2015 10:34 pm

Small correction, None of the cable is exposed on this bike. The cable housings run all the way, point to point with no ferrules and gaps or fancy frame attachment points. It has cable retainers that look a lot like zip ties, but they're molded, perfect fit rings for one or 2 cables. Not sure I want to disturb that at all. If I can get new cables or shifters in, without disturbing the housings, I might just do that :)
Tomcat65
 
Posts: 1502
Joined: Mon Jun 23, 2014 3:12 pm
Location: Western Kentucky

Re: 1984 Murray X12 590x34 22" frame .. restore?

Postby Falkon45 » Fri Jan 09, 2015 10:22 am

Now that's just awesome! I didn't think Murray put those on their bikes. Now that's cool. Don't pull then off. They don't take back to original form very well. The sj10 had one on the down tube, but it still ran exposed cable to the derailleurs.
Falkon45
 
Posts: 1905
Joined: Mon Jan 07, 2013 3:22 am

Re: 1984 Murray X12 590x34 22" frame .. restore?

Postby Tomcat65 » Fri Jan 09, 2015 1:37 pm

Quick update
On disassembly of the head tube I found.... it will accept a 1 1/8 headset :D :D :D
This could turn 650c/b Cyclocross style nasty :P
But the next item for consideration is the narrow-ish 120mm rear dropout spacing
Thoughts? Can a typical steel frame take a 15mm spread? (almost 5/8inch)
It has an adjustable rear gusset for the rear brake, I assume they used the same frame for their, fairly new to 1984, 27" wheel size. I had a 27" road bike in 1980 with 12 speeds and it was the first one I had ever seen, but I do live in sheltered rural Kentucky for cobb's sakes :D Anyway, I believe there's plenty of room under the gusset for a 650c dual purpose tire. Or could I get away with a 120mm wide hub with a 650x33, maybe 35 dual purpose tire?
Obviously, I'm kind of not familiar with the cross bikes, but I like the idea of maybe not being stuck on a Road Only bike
Tomcat65
 
Posts: 1502
Joined: Mon Jun 23, 2014 3:12 pm
Location: Western Kentucky

Re: 1984 Murray X12 37x590wheel 22" frame .. restore?

Postby Tomcat65 » Sun Jan 11, 2015 9:41 pm

So.. I removed the rear axle today, was going to pop the freewheel off and see about a little maintenance and found a freehub with the 6 speed cassette. You have to have 2 chain whips to remove it because the small outer cog is the threaded locknut. Like this set
mnt1J3hKPWx_yuSjGuuzDHA.jpg
mnt1J3hKPWx_yuSjGuuzDHA.jpg (9.99 KiB) Viewed 730 times

The selection of 37 590 tires is slim. I'm starting to think I might just replace the tires and tubes and do a thorough clean-up and maintenance... and call this turkey Done.
It also has a weird Shimano rear derailleur with an inverted idler and jockey wheel cage. It's unique to say the least. It also has worn out springs that let the chain droop. There's just almost No tension.

I have an old set of steel MTB 26" wheels (freewheel hub) that accept all of the latest 26" tire styles. And I have a strong Shimano Tourney rear derailleur. I have about a half dozen 6 and 7 speed freewheels... and I could slap that crap on and pretend it's Cyclocross ready lol... But this is just a cool old bike and I'm starting to not want to mess it up.
Tomcat65
 
Posts: 1502
Joined: Mon Jun 23, 2014 3:12 pm
Location: Western Kentucky

Re: 1984 Murray X12 37x590wheel 22" frame .. restore?

Postby Falkon45 » Mon Jan 12, 2015 3:33 am

That's crazy. . But, depending on the year, this may be one of those Murray bikes built by another company. . Those usually came with a 3 piece crank set, but this seems to have a lot of trickle down from that bike.
Falkon45
 
Posts: 1905
Joined: Mon Jan 07, 2013 3:22 am

Re: 1984 Murray X12 37x590wheel 22" frame .. restore?

Postby Tomcat65 » Sat Jan 24, 2015 8:58 pm

And so, this bike is going nowhere lol.. been talking and looking and overthinking as usual..
Looks like a set of tires and ride as is. I am going to make a few aluminum shift levers, actually I already have 4 ready for final shaping. Wanting to find some near paper thin washers/ spacers to isolate the aluminum from the steel shifter bracket before I reassemble. Add some sort of grease and I hope galvanic action doesn't get all crazy and turn the chrome or the aluminum... will add more later, maybe a few pics of the home built shift levers :)
Tomcat65
 
Posts: 1502
Joined: Mon Jun 23, 2014 3:12 pm
Location: Western Kentucky

Re: 1984 Murray X12 37x590wheel 22" frame .. restore?

Postby Tomcat65 » Thu Feb 19, 2015 4:18 pm

Just tossing this out there... I've been comparing and reading and studying, overthinking again..
What I have found, is that
a 26" 590 wheel is considered a 650a wheel size. The outside diameter actually measures 604mm. with the tire 657mm or 25 7/8"
The 700c wheel designation refers to a 622mm wheel size. The actual outside diameter 630mm. Tire diameter 685mm or 27"

For a half inch of difference in radius, I'd like to get rid of these chrome steel HEAVYMotha wheel rims, and go light with new 700c rims with more tire choices and a 1/2" more bb height. I kind of hate to mess this old bike up, but finding really good affordable 590 tires has been no fun. I did find one set from Niagra, It's a CST Scales 26 x 1 3/8 with a reflective sidewall, but it only holds 65psi.

So, do any of you guys think the weight difference would make a difference? Or would I be just throwing cash away on a hopeless heavy steel frame nightmare?
Tomcat65
 
Posts: 1502
Joined: Mon Jun 23, 2014 3:12 pm
Location: Western Kentucky

Re: 1984 Murray X12 37x590wheel 22" frame .. restore?

Postby Falkon45 » Thu Feb 19, 2015 7:02 pm

I still say go 650c. But 700c might not rub too much. It will definitely be worth the weight loss. I bought my Stars circle aviate wheels for $100 shipped. Not the lightest set, but strong. Nashbar has a few 700c sets for decent prices also.
Falkon45
 
Posts: 1905
Joined: Mon Jan 07, 2013 3:22 am

Re: 1984 Murray X12 37x590wheel 22" frame .. restore?

Postby Tomcat65 » Thu Feb 19, 2015 10:32 pm

Hmmm.. Just saying, 26" tires are supposed to be 26" tall... right? But 650mm is actually 25 9/16"

The 700c is ISO 622mm, 16mm taller than the 590 inside the fork, 32mm taller overall
The 650 is ISO 597mm, most commonly found on old Schwinns
The 650a is ISO 590mm, which is the size I have now
The 650b is ISO 584mm, Hmmm...
The 650c is ISO 571mm, which would make the tire shorter than what I have now..
Then the 26" ISO 559mm, the latest 26"MTB/Cruiser standard

This could be thoroughly confusing :P

Sheldon Brown says the 650, 650a, 650b, and 650c all come to 26" with road tires. Though he probably didn't know at the time, the 650b with wide mountain bike tires is going to measure taller than 650mm...

OMG, I think I'll just buy the 65psi CST Scales 37-590's and run these chrome steel wheels, and remind everybody it's a French size 650a lol

This kind of makes the whole 650b thing look like even more of a marketing scam than before :roll:
http://sheldonbrown.com/650b.html
http://www.niagaracycle.com/categories/cst-scales-tire-26-x-1-3-8-wire-bead-black-black-with-reflective-strip
Last edited by Tomcat65 on Sun Aug 07, 2016 11:45 am, edited 1 time in total.
Tomcat65
 
Posts: 1502
Joined: Mon Jun 23, 2014 3:12 pm
Location: Western Kentucky

PreviousNext

Return to Big Box Road Bikes

Who is online

Users browsing this forum: No registered users and 1 guest