rdtompki

Thought I would cross-post in this forum since there seems to be a lot of Miyata traffic hereabouts. Finished a complete rebuild of my 1984 Miyata 912 and took it for a very short spin. Really a nice handling bike, but the downtube shifters will take some getting used to. Cables, bearings, headset, chain all new. Seat and pedals off my wife's Giant. Galvanized spokes are original (32 spoke wheels) and I don't recall ever breaking a spoke. 700x23 tires are maybe a bit on the skinny side for my current 215 lbs, but I'm headed toward 190 anyway. Triple crank was built up when we first bought the bikes. Handlebar tape awaiting some more test riding. The paint is pretty scuffed up so maybe in the distant future a paint job is in order. Haven't worked on a bike in 20 years so I had a few "oops", but my LBS was very helpful.

I've spent enough time on these forums to know my refurb skills are lacking, but I've still got my wife's old 912 to work on.

I might call this N+1/2 since I'm going to let one of my adult sons use it. Of course I'm going to co-opt his mountain bike

riva

What'd it take to get that 3rd chainring on there?

dit

Inquiring minds want to know......about that 3rd chain ring

purevl

Am I missing something regarding the excitement over the triple? Looks like a regular old 110x74 to me...

treebound 

Some Bridgestones and possibly Miyatas as well were drilled and tapped for a third chainring and their front derailers and shifters have enough travel built in to make it relatively simple to do as long as you can find a chainring with the right BCD mounting.

I'd have to check my NineTwelve when I get home to see if it is set up that way.
https://www.miyatacatalogs.com/2007/1...alog-1984.html

purevl

I would say that conservatively 70% of 110 BCD cranks I've come across are triple ready, almost every Sugino or Sakae crank I have in that size is drilled and tapped, and many of the ones that aren't have the "boss" they just weren't drilled.

jonwvara 

Hey, that's the same color as my 912, except that mine has a pearlescent pink head tube. I bought it as a bare frame a couple of years ago and built it up with mostly Suntour Cyclone parts instead of the original Shimano 600. I've got a triple on mine, too. It's a great ride. Enjoy yours and don't be in too much of a hurry to paint it. I kind of regret both of the bike repaints I've had done even though they came out well--after you scratch the new paint a few times you start thinking "hell, I might just as well have left it with the ORIGINAL scratches."
JV

rdtompki

Triple was added 24 years ago, but the cranks are original Shimano 600 with built-in extractor (which is very handy). I suspect all the LBS had to do was add the small chainring. The small chainring is indeed a 74mm BCD. The only parts I'm missing are replacements for the original rubber hood covers. Shimano 600 brake levers mounts are very small compared to their modern equivalent. I'm going to hold up taping the handlebars until I find something that looks better than what I have on there.

vanbiker

I picked up a 1981 Miyata 912 this summer intending to make it a rain/winter bike. Put on fenders and a rear rack. I love it so much, I feel guilty riding it in the rain. It is all original, Shimano 600 Arabesque, galvanized spokes on alloy rims, etc. I did put on some Nitto noodle bars and a new stem, but that is it. I love the geometry and the ride, very stable. When a sunny day came around this winter I hopped on my beloved '06 Lemond and came home "out of love" with it. The geometry is just wrong for me, too big in the top tube. My hands were numb, along with my feet and crotch. Despite an ultra short stem and the saddle slid forward, it is just too big. It is a great bike, super stable and responsive, just too big. So, I stripped it, built up a used Serotta frame with similar geo to the Miyata, and have the Lemond up for sale. The 912 has gotten me smitten with high-end vintage road rides!

nine14six

Here's your 912's twin brother of another color.