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View Full Version : Bridgestone MB-2 Rebuild: 16 years later, I finally got my shocks :)



Bob98SR5
07-29-2008, 12:28 AM
Back in 1989, I saw my first mountain bike race on a tv news show. It was one of those, "Ok, I gotta go buy one" moments. So I bought a Specialized Rock Hopper, which was a cool bike at the time, but a giant fat pig. But it gave me my first taste of mountain biking.

Fast forward a few years, and I'm in college and working part time. I started reading a little more about mountain bikes. There was this obscure company called "Bridgestone". I didn't equate it with the tire company, even despite its familiar logo. So I started reading more and more about the company and its quirky marketing and parts philosophy. It seemed that this company was willing to go out on a limb and hand select components from different companies instead of buying the whole "groupo (what a flamingly word...grouppo)." Not to mention, this thing was made in Japan. I am a big fan of Japanese and German products, so this fit my quality purchase philosophy.

I saved pretty much all my non-tuition part time money to buy this bike. So in the summer of 1991, I bought my first real mountain bike, the Bridgestone MB-2:

http://i176.photobucket.com/albums/w177/bob98sr5/4Runner/bridgestone-mb2.jpg

Wow, when I took it out on the lot, it was something else. It just fit well. And when I first took it on the trails in Riverside (cough, cough...gasp...air), I was in love. Man, I rode that thing wherever and whenever I got the change. It had Diacomp cantilever brakes (spongy, but predictable) as well as Deore DX thumbshifters. Who remembers thumb shifters!!! :D Well guess what? I love those thumbies even today, though I set it on friction mode like a 10 speed.

So after college, I started to ride less and less. New bikes came on the scene, I tested a few of them, but they didn't fit right. Back then, all the rage was aluminium tubing, especially made popular especially by Cannondale, and later, Trek and Specialized. But you know, to this day, nothing feels as good as Tange Prestige steel. Nice, forgiving and predictable feel. I started to find reasons to ride again. There was a local trail and I decided I need to upgrade parts. The first thing I did was to ditch the cantilever brakes, the Richie fork had to go, and the seat had to go as well. So I replaced all of the above with Shimano XT brakes, Specialized Air/oil shocks (cheapy), and a Specialized saddle. But if there was one thing that I really wanted was the Rock Shox Mag 21s. Boy, those shocks were the shiznit. Fully adjustable and Gold like Flavah flav's mouth. I yearned to have them, but I could not justify dropping down the bucks.

16 years later, a random Crazedlist.org's search and lo and behold, some fella up in Alameda, CA is selling them. $50 with shipping. I email the guy and say "$50 shipped" and he agrees. Three days later, I'm polishing this thing like a freakin' Oscar:

http://i176.photobucket.com/albums/w177/bob98sr5/4Runner/mag21s.jpg

I'm going to refurb my trusty MB-2 and find a nice place for it in my garage once I clean it out and build my biodiesel processing system. I'm going to make sure my MB-2 is no longer left outside to weather and suffer another cold winter out in the elements. I must say that of all the mods/upgrades, none of them did this bike any good. I hope though, that the Mag 21s are going to be different. I'm on the hunt for the original parts. I am kicking myself in the ass for throwing them away. I especially want to buy some Deore DX pedals with the toe clips. I remember they were so easy to get in and get out, perfect for riding to school and on campus. Not all gay looking in clipless shoes and clippety clopping around like a fool on a stool on campus. On that note: hey Chang, were you one of those flamers?!? :)

Guys: where's the best place to look for old parts?

So welcome home, my friend. You have some new (front) legs. My apologies for taking off your original parts and neglecting you for so long. Don't worry, my friend, we'll be off again.

(Thanks for allowing me the opportunity to take you down memory lane) :)

Bob

04 Rocko Taco
07-29-2008, 08:25 AM
Good deal, and great story telling Bob. Look forward to seeing your progress on the bike!

4x4mike
07-29-2008, 08:37 AM
Wow a Mag 21. When I was 14 I saved all my pennies and bought a brand new quadra 21R. I was the coolest kid on the block. Little did I know that I was at the beginning of an obsession. I think you should cruise ebay and look for the titanium crown for your new Mag.

How is the shock? Does it hold air? Leak oil? The Mag21 were the shock to have but were plauged with problems. They would leak and you'd see people riding around with them fully compressed. I've been a mechanic for 11 years and have only had to open one up once and it's because I pulled the shortest straw. Rock Shox made a bunch of special tools for that shock and they are very hard to come by these days. Some shops have them but the guys that know how to use them are gone. Our shop had a couple of homemade tools that made it a little easier. I think RS has pdf instructions on their site but it'll be nice to have the tools.

As for old parts I'd look at craigslist and ebay. Some of the old stuff nets some good money so watch out. I don't have any of the old stuff you're looking for so I'm of no help.

Congrats on the find. BTW if you're crusing ebay and you find a brake brace I'd buy it. Just the regular stock black one. They tent to brake and without them the shock doesn't work right and will self destruct.

Bob98SR5
07-29-2008, 08:59 AM
mike,

shocks do not leak anywhere. i was dreading that, but so far, they look good. mind you, i have not installed and ridden them yet, so who knows what'll happen then. but i did find documentation on this shock in a pdf format, so im feeling ok. also, i found a company that makes replacement seal parts too.

i'll probably hit you up for some advice if you dont mind re rebuild!

thanks,
bob

4x4mike
07-29-2008, 10:24 AM
I don't own any rock shox tools as I have not owned one of their shocks for years. No a days there are very few proprietary tools anyways. You need to make sure they have oil though. I'm pretty sure you have to pop the tops to make sure. Problems is that once you start opening things up they might leak. I'll check to see if I have any info on them at home.

Bob98SR5
07-29-2008, 12:59 PM
mike,

no biggie re tools, info, etc. i have yet to install them, so if i do have questions, i'll email ya.

thanks though :)

bob

4x4mike
07-29-2008, 01:59 PM
No problemo

Robinhood4x4
07-29-2008, 08:45 PM
I remember wanting those shocks back in high school or college.

Bob98SR5
09-10-2008, 12:28 AM
update: last night, i attempted to install the shocks, but the steerer tube was too large (1 1/8"). mine is 1". so i removed the crown + steerer tube as one piece off my mag 10s and fastened it on the mag 21s. fits fine and i successfully tightened it down using my homemade 32mm wrench i made at lance's place over the weekend.

http://i176.photobucket.com/albums/w177/bob98sr5/Bridgestone%20MB-2/mag21-install.jpg

now that i have them on, the shocks seem to have a leak somewhere. they compress way too easy even on the hardest setting. looks like i'll have to rebuild these. if i do, i'm looking into the long travel kit. might as well if i am going to take them apart.

chang oh: do you have any of these tools? if yes, lets meet up.

tulsa_sr5
09-10-2008, 04:23 AM
Wow Bob! You are taking me back, we must be around the same age. Had a friend with a bridgestone, and we rode all over Poudre Canyon west of Fort Collins. It was a great bike, and he was insane. Good times. After college I switched to a Cannondale, and still have it actually. I preferred the steel Univega I had before it though, and hate to say that frame ended up in a dumpster during the move from Denver. Not the most prestigious make, but I test rode pretty much everything there was at the time, and it fit and felt best for me. Plus was cheap for having all lx components at the time.

cooldry
09-10-2008, 08:02 AM
Hey Bob,

Good job on the bike, but unfortunately I don't have any tools for shocks. I've always just taken them in to get them worked on. If you want almost new shocks, you can send them back to Rock Shox and they'll service it for you. Anything that needs to be replaced they will and make it pretty much good as new. As old as the shocks are, you probably need to change most of it out anyway. You should try contacting them to see and get an estimate on how much it will be. Nick had his done and it's like having new shocks. Well worth it in my opinion. Let's ride soon.

4x4mike
09-10-2008, 12:13 PM
The air seals are probably dried up and/or blown. Like I said there are special tools for the Mag forks and most shops either don't know what they are or don't have them. I'd look for an old shop with an old timer working in the shop. They'll know how to work on them or have the parts.

My old shop had the tools but I think we traded another shop for a case beer or something.

garrett
09-10-2008, 09:12 PM
that surly looks fun :thumbup:

Bob98SR5
09-11-2008, 10:15 AM
chang, thanks for the advice. I've found a doc from a website that sells mag 21 parts. i'm going to review it more thoroughly to see what it entails and see if i can't make my own tools myself.

Bob98SR5
04-02-2009, 12:41 AM
Some more stuff that I've done with the bike rebuild:

- New grips that are similar in style to the original Ritchey grips



- Purchased and installed some used XT pedals I bought one ebay. (OEM came with DX, no difference really)
http://farm4.static.flickr.com/3633/3406649700_1d09140f19.jpg?v=0

http://farm4.static.flickr.com/3585/3405838419_0b40795ac2.jpg?v=0

paddlenbike
04-02-2009, 08:05 AM
Sweet...get that puppy rebuilt and let's ride!

Small_words
04-02-2009, 08:13 AM
I had a Giant growing up and never understood why I was dog$#% tired all the time. Then my brother bought a Bridgestone, which he still has, and I rode it for three hours on the trails around our house. That bike got me hooked on mtn. biking and I WILL buy his old bike if he ever sells it. Keep the posts up Bob, I'll have to rebuild the Marzocchi shocks on my Kona.