Specialized Rockhopper '91 build
#1
Full Member
Thread Starter
Join Date: Jan 2022
Posts: 476
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 253 Post(s)
Liked 223 Times
in
118 Posts
Specialized Rockhopper '91 build
Hi,
following the acquisition of a Specialized Rockhopper from '91 and a lovely discussion as to what type of shifting I shall put on, I will try'n document the build progress in this thread. I hope that is okay - if mods don't allow such shameless self promotion ( ) please feel free to delete this.
Frame seems to be in quite good condition, just needs proper clean and shine to make it sparkle.
W/o further ado, here goes: Pic of the bike as bought:
Rockhopper in his dusty state as aquired
Stripped the bike down to the frame and removed everything to get the frame cleaned and buffed up with some car wax. While seatpost and quill stem came off no problem, as expected BB gave (and still gives) me troubles. The non-drive side was easily loosened and removed, despite some rust build up in the BB-shell. The drive side hower, won't budge. Will take it to a bikeshop to get the drive side cup loosened/removed
Stuck drive side BB shell. (frame still needs to be washed and polished)
Aight, that's the progress so far. Hope that's something all of you are interested in. Will update in due course.
Peace!
following the acquisition of a Specialized Rockhopper from '91 and a lovely discussion as to what type of shifting I shall put on, I will try'n document the build progress in this thread. I hope that is okay - if mods don't allow such shameless self promotion ( ) please feel free to delete this.
Frame seems to be in quite good condition, just needs proper clean and shine to make it sparkle.
W/o further ado, here goes: Pic of the bike as bought:
Rockhopper in his dusty state as aquired
Stripped the bike down to the frame and removed everything to get the frame cleaned and buffed up with some car wax. While seatpost and quill stem came off no problem, as expected BB gave (and still gives) me troubles. The non-drive side was easily loosened and removed, despite some rust build up in the BB-shell. The drive side hower, won't budge. Will take it to a bikeshop to get the drive side cup loosened/removed
Stuck drive side BB shell. (frame still needs to be washed and polished)
Aight, that's the progress so far. Hope that's something all of you are interested in. Will update in due course.
Peace!
Last edited by Positron400; 07-31-22 at 02:03 PM.
#2
Senior Member
Join Date: Apr 2012
Location: Middle Earth (aka IA)
Posts: 20,437
Bikes: A bunch of old bikes and a few new ones
Mentioned: 178 Post(s)
Tagged: 0 Thread(s)
Quoted: 5890 Post(s)
Liked 3,475 Times
in
2,080 Posts
Bike forums would fall apart without a lot of shameless self promotion! You are in good company. Looking forward to watching the build. I’m a big fan of vintage MTBs, especially Specialied
Likes For bikemig:
#3
Full Member
Thread Starter
Join Date: Jan 2022
Posts: 476
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 253 Post(s)
Liked 223 Times
in
118 Posts
Quick update - My LBS had a 36mm flat wrench and loosened the drive side cup in like 2 seconds . Removed the cup and gave the frame a thorough clean and degrease. Not really much rust buildup except for some in the BB shell. Some WD40 in there and in the steerer/seat tube and drying it overnight. Next up - wax and shine! No pictures at this point as there is no discernible difference to the one I posted
#4
Senior Member
Join Date: Oct 2015
Location: PDX
Posts: 13,090
Bikes: Merz x 5 + Specialized Merz Allez x 2, Strawberry/Newlands/DiNucci/Ti x3, Gordon, Fuso/Moulton x2, Bornstein, Paisley,1958-74 Paramounts x3, 3rensho, 74 Moto TC, 73-78 Raleigh Pro's x5, Marinoni x2, 1960 Cinelli SC, 1980 Bianchi SC, PX-10 X 2
Mentioned: 269 Post(s)
Tagged: 0 Thread(s)
Quoted: 4520 Post(s)
Liked 6,405 Times
in
3,685 Posts
Quick update - My LBS had a 36mm flat wrench and loosened the drive side cup in like 2 seconds . Removed the cup and gave the frame a thorough clean and degrease. Not really much rust buildup except for some in the BB shell. Some WD40 in there and in the steerer/seat tube and drying it overnight. Next up - wax and shine! No pictures at this point as there is no discernible difference to the one I posted
We often discuss this here, at length, ad nauseum, many, many schools of thought, albeit some misguided.
These can often be a challenge, if this one came off with just a wrench it was not and may have not been tight enough.
Keep in mind that if they are stuck or very tight as they should be and often are, the LBS may not be up to the task, this can go south very fast, if they attempt and fail it can get desperate as rounded off flats can be very hard to overcome.
They need to come out on the first try when they are really stuck, seized, etc. it usually takes far more than a wrench.
All that said, welcome aboard, glad you found us, you're in the right place. We love these.
Likes For merziac:
#5
Full Member
Thread Starter
Join Date: Jan 2022
Posts: 476
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 253 Post(s)
Liked 223 Times
in
118 Posts
Thanks for the warm welcome and the positive feedback -.I've only been slowly building up the courage/know how to wrench on my own, but my last build gave me confidence to keep going with these.
As promised, I will be providing more updates and pictures. A load of parts should be coming in this week to fully build up the frame. (fingerscrossed)
Likes For Positron400:
#6
Senior Member
Join Date: Oct 2015
Location: PDX
Posts: 13,090
Bikes: Merz x 5 + Specialized Merz Allez x 2, Strawberry/Newlands/DiNucci/Ti x3, Gordon, Fuso/Moulton x2, Bornstein, Paisley,1958-74 Paramounts x3, 3rensho, 74 Moto TC, 73-78 Raleigh Pro's x5, Marinoni x2, 1960 Cinelli SC, 1980 Bianchi SC, PX-10 X 2
Mentioned: 269 Post(s)
Tagged: 0 Thread(s)
Quoted: 4520 Post(s)
Liked 6,405 Times
in
3,685 Posts
..In fairness, it took the "assistance" of a fairly solid WHACK on the end of the wrench with a hammer, so to me, it seemed to be proper tight BBs always make me nervous when I need to loosen them.
Thanks for the warm welcome and the positive feedback -.I've only been slowly building up the courage/know how to wrench on my own, but my last build gave me confidence to keep going with these.
As promised, I will be providing more updates and pictures. A load of parts should be coming in this week to fully build up the frame. (fingerscrossed)
Thanks for the warm welcome and the positive feedback -.I've only been slowly building up the courage/know how to wrench on my own, but my last build gave me confidence to keep going with these.
As promised, I will be providing more updates and pictures. A load of parts should be coming in this week to fully build up the frame. (fingerscrossed)
I never use a hammer on these, one slip and....
Plenty of folks do it so, whatever, glad they got it right, this time.
As you can see, we're glad to help. This is a good test case while not being a really special subject but being very well revered none the less.
Get this right and the ones that follow are likely to be less challenging as you move forward.
Likes For merziac:
#7
feros ferio
Join Date: Jul 2000
Location: www.ci.encinitas.ca.us
Posts: 21,804
Bikes: 1959 Capo Modell Campagnolo; 1960 Capo Sieger (2); 1962 Carlton Franco Suisse; 1970 Peugeot UO-8; 1982 Bianchi Campione d'Italia; 1988 Schwinn Project KOM-10;
Mentioned: 44 Post(s)
Tagged: 0 Thread(s)
Quoted: 1393 Post(s)
Liked 1,334 Times
in
840 Posts
I can't tell what shift levers you have, but I am very partial to good old-fashioned friction or truly friction-compatible thumbies on mountain bikes.
__________________
"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069
"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069
#9
Senior Member
Join Date: Mar 2015
Location: New Zealand
Posts: 1,053
Bikes: Gunnar, Shogun, Concorde, F Moser, Pete Tansley, Rocky Mtn, Diamant, Krapf, Marin, Avanti, Winora, Emmelle, Ken Evans
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 275 Post(s)
Liked 417 Times
in
218 Posts
very nice project.
for next time, try this Sheldon Brown trick:
Get a bolt/nut and some washers. Do it up on the fixed cup and keep turning it.
You can apply a lot of force this way, with a long pipe over the wrench (I use a tow-bar bike rack).
for next time, try this Sheldon Brown trick:
Get a bolt/nut and some washers. Do it up on the fixed cup and keep turning it.
You can apply a lot of force this way, with a long pipe over the wrench (I use a tow-bar bike rack).
Likes For Soody:
#10
Full Member
Join Date: Feb 2013
Location: Worcester, Massachusetts
Posts: 308
Bikes: Fuji Sportif 1.7C, Shogun Metro AT, Jamis Durango SX, Miyata Alumicross, Fuji Special Road Racer, Mongoose ATB, Fuji SST 1.0 Team, Gitane (?), Specialized Rockhopper SS, Univega Gran Turismo, Univega Supra Sport Mixte, Nishiki Tri-A, Diamondback Coil
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 82 Post(s)
Liked 141 Times
in
78 Posts
NIce bike! I hear ya on the bb cup, that can be a tough one. I've had bikes where I've just left it on there and cleaned it from the other side. That's the good thing about the older three-piece BBs, I guess. I brought a pretty darn similar Rockhopper back to life during the summer of 2020. The co-op couldn't open shop because of pandemic restrictions, so we basically started a list of people who needed bikes, and spent the summer refurbishing and delivering bikes like Santa Claus. It was a crazy but wonderful experience. This one went to a young graduate student at a local university from Pakistan who got stranded for the summer in all the international air travel craziness and needed something to get around on. It came in as if it was pulled from a tar pit, but it cleaned up well, as most Specialized bikes do.
Likes For PugRider:
#11
Full Member
Thread Starter
Join Date: Jan 2022
Posts: 476
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 253 Post(s)
Liked 223 Times
in
118 Posts
Regarding the build progress - just now polished the frame up and it looks loads better now! No more dull frame but lovely and shiny! The dings and scratches are still there, since I didn't go the clay bar route but I dont mind them too much
Before polishing
After polishing
Quickly tried to put my Hollowtech BB in and thought I had the wrong one, since the width of the BB was 73 mm and I was sure It had to be 70 mm. Bike standards are weird!
Next up: Quill stem adapter & stem + BB and Crankset - And maybe a quick testfit of the drop bars (If they arrive anytime soon :/ )
Peace!
#13
Senior Member
Join Date: Jul 2022
Location: Pac NW
Posts: 1,966
Bikes: several Eddy Merz (ride like Eddy, braze like Jim!)
Mentioned: 41 Post(s)
Tagged: 0 Thread(s)
Quoted: 1093 Post(s)
Liked 1,839 Times
in
674 Posts
I have the same bike in red. Bought at the Janzen Beach REI. They didn't carry specialized so I had it shipped in from their Atlanta Store.
Now when I ride it, people comment on vintage steel. I don't feel that old where a bike I bought brand new is considered vintage. But, it bothers me much less than overhearing some youths comment on the music they listen to.
"I like the oldies, you know....like the BEASTIE BOYS"
grrr.
Now when I ride it, people comment on vintage steel. I don't feel that old where a bike I bought brand new is considered vintage. But, it bothers me much less than overhearing some youths comment on the music they listen to.
"I like the oldies, you know....like the BEASTIE BOYS"
grrr.
Likes For Robvolz:
#14
Senior Member
Join Date: Oct 2015
Location: PDX
Posts: 13,090
Bikes: Merz x 5 + Specialized Merz Allez x 2, Strawberry/Newlands/DiNucci/Ti x3, Gordon, Fuso/Moulton x2, Bornstein, Paisley,1958-74 Paramounts x3, 3rensho, 74 Moto TC, 73-78 Raleigh Pro's x5, Marinoni x2, 1960 Cinelli SC, 1980 Bianchi SC, PX-10 X 2
Mentioned: 269 Post(s)
Tagged: 0 Thread(s)
Quoted: 4520 Post(s)
Liked 6,405 Times
in
3,685 Posts
Cool! Will definitely try this the next time I encounter a stubborn BB shell - Thanks!
Regarding the build progress - just now polished the frame up and it looks loads better now! No more dull frame but lovely and shiny! The dings and scratches are still there, since I didn't go the clay bar route but I dont mind them too much
Before polishing
After polishing Peace!
Regarding the build progress - just now polished the frame up and it looks loads better now! No more dull frame but lovely and shiny! The dings and scratches are still there, since I didn't go the clay bar route but I dont mind them too much
Before polishing
After polishing Peace!
I would bet that scuffing on the seatstay could be lessened by at least 50% with rubbing compound or medium cut cleaner and more elbow grease.
Anytime the paint is still there and mostly intact, there's often room for improvement, sometimes a lot and sometimes you have to really get after it with your thumb and scrub it good.
The results can be amazing as we see here.
#15
Happy banana slug
Join Date: Sep 2015
Location: Arcata, California, U.S., North America, Earth, Saggitarius Arm, Milky Way
Posts: 3,702
Bikes: 1984 Araya MB 261, 1992 Specialized Rockhopper Sport, 1993 Hard Rock Ultra, 1994 Trek Multitrack 750, 1995 Trek Singletrack 930
Mentioned: 31 Post(s)
Tagged: 0 Thread(s)
Quoted: 1534 Post(s)
Liked 1,534 Times
in
920 Posts
Cool! Will definitely try this the next time I encounter a stubborn BB shell - Thanks!
Regarding the build progress - just now polished the frame up and it looks loads better now! No more dull frame but lovely and shiny! The dings and scratches are still there, since I didn't go the clay bar route but I dont mind them too much
Peace!
Regarding the build progress - just now polished the frame up and it looks loads better now! No more dull frame but lovely and shiny! The dings and scratches are still there, since I didn't go the clay bar route but I dont mind them too much
Peace!
#16
Full Member
Thread Starter
Join Date: Jan 2022
Posts: 476
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 253 Post(s)
Liked 223 Times
in
118 Posts
Thanks for the hint!
Likes For Positron400:
#17
Full Member
Thread Starter
Join Date: Jan 2022
Posts: 476
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 253 Post(s)
Liked 223 Times
in
118 Posts
Progress update
Ritchey Venture Max 460 mm Bars arrived, plus I installed the Hollowtech BB. Bars were fit to a quill stem adapter and a 100 mm PRO stem.
Not a fan of all those spacers, but couldnt get the adapter lower - Might need to switch it eventually for a shorter one.
Also the Maxxis tyres arrived today
Ritchey Bars & quill stem adapter. (and too many spacers :/ )
Hollowtech BB
...and some Maxxis DTH 26x2.15 tyres! Should be fun!
Starting to look like a proper ride (almost )
Peace!
Ritchey Venture Max 460 mm Bars arrived, plus I installed the Hollowtech BB. Bars were fit to a quill stem adapter and a 100 mm PRO stem.
Not a fan of all those spacers, but couldnt get the adapter lower - Might need to switch it eventually for a shorter one.
Also the Maxxis tyres arrived today
Ritchey Bars & quill stem adapter. (and too many spacers :/ )
Hollowtech BB
...and some Maxxis DTH 26x2.15 tyres! Should be fun!
Starting to look like a proper ride (almost )
Peace!
#18
Full Member
Thread Starter
Join Date: Jan 2022
Posts: 476
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 253 Post(s)
Liked 223 Times
in
118 Posts
Update
In todays editon of : "You wont believe the incompatibility issues you can run into when building a bike": Apparently my GRX crankset is incompatible with the BB I planned on using - So I guess I have to get a "proper" MTB crank to get the spindle length right
In todays editon of : "You wont believe the incompatibility issues you can run into when building a bike": Apparently my GRX crankset is incompatible with the BB I planned on using - So I guess I have to get a "proper" MTB crank to get the spindle length right
#19
Senior Member
Join Date: Oct 2015
Location: PDX
Posts: 13,090
Bikes: Merz x 5 + Specialized Merz Allez x 2, Strawberry/Newlands/DiNucci/Ti x3, Gordon, Fuso/Moulton x2, Bornstein, Paisley,1958-74 Paramounts x3, 3rensho, 74 Moto TC, 73-78 Raleigh Pro's x5, Marinoni x2, 1960 Cinelli SC, 1980 Bianchi SC, PX-10 X 2
Mentioned: 269 Post(s)
Tagged: 0 Thread(s)
Quoted: 4520 Post(s)
Liked 6,405 Times
in
3,685 Posts
Well it can still be labor intensive but when you find the right stuff that clicks with your style of work, it can really be an "ah ha" moment and from then on you can get right to it for better faster results. Turtle wax chrome polish and rust remover can work wonders as well, may not be available where you are but should be online. Not for paint but great on chrome and can help with other metals as well, add scotchbrite for more aggressive metal cleaning, start off easy and lean in as it goes well.
#20
Senior Member
Join Date: Mar 2015
Location: New Zealand
Posts: 1,053
Bikes: Gunnar, Shogun, Concorde, F Moser, Pete Tansley, Rocky Mtn, Diamant, Krapf, Marin, Avanti, Winora, Emmelle, Ken Evans
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 275 Post(s)
Liked 417 Times
in
218 Posts
Update
In todays editon of : "You wont believe the incompatibility issues you can run into when building a bike": Apparently my GRX crankset is incompatible with the BB I planned on using - So I guess I have to get a "proper" MTB crank to get the spindle length right
In todays editon of : "You wont believe the incompatibility issues you can run into when building a bike": Apparently my GRX crankset is incompatible with the BB I planned on using - So I guess I have to get a "proper" MTB crank to get the spindle length right
The 73mm hollowtech bbs are 5mm narrower than the 68 road ones. The size ends up being the same if you don't use the included spacers.
It's all compatible as long as it's right for your chainline.
#21
Space Ghost
Join Date: Oct 2017
Location: NYC
Posts: 1,762
Bikes: Bridgestone, Fuji, Iro, Jamis, Gary Fisher, GT, Scott, Specialized and more
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 292 Post(s)
Liked 412 Times
in
318 Posts
I have the same bike in red. Bought at the Janzen Beach REI. They didn't carry specialized so I had it shipped in from their Atlanta Store.
Now when I ride it, people comment on vintage steel. I don't feel that old where a bike I bought brand new is considered vintage. But, it bothers me much less than overhearing some youths comment on the music they listen to.
"I like the oldies, you know....like the BEASTIE BOYS"
grrr.
Now when I ride it, people comment on vintage steel. I don't feel that old where a bike I bought brand new is considered vintage. But, it bothers me much less than overhearing some youths comment on the music they listen to.
"I like the oldies, you know....like the BEASTIE BOYS"
grrr.
Hard to believe that MCA is gone and the remaining beasties are among the elder statesmen of hip hop now.
#22
Full Member
Thread Starter
Join Date: Jan 2022
Posts: 476
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 253 Post(s)
Liked 223 Times
in
118 Posts
Well it can still be labor intensive but when you find the right stuff that clicks with your style of work, it can really be an "ah ha" moment and from then on you can get right to it for better faster results. Turtle wax chrome polish and rust remover can work wonders as well, may not be available where you are but should be online. Not for paint but great on chrome and can help with other metals as well, add scotchbrite for more aggressive metal cleaning, start off easy and lean in as it goes well.
GRX is just hollowtech II right? If you have a 73mm shell you can run road cranks with a 73mm 'mtb' hollowtech bb like deore bb52.
The 73mm hollowtech bbs are 5mm narrower than the 68 road ones. The size ends up being the same if you don't use the included spacers.
It's all compatible as long as it's right for your chainline.
The 73mm hollowtech bbs are 5mm narrower than the 68 road ones. The size ends up being the same if you don't use the included spacers.
It's all compatible as long as it's right for your chainline.
Lesson learned, I guess
#23
Senior Member
Join Date: Mar 2015
Location: New Zealand
Posts: 1,053
Bikes: Gunnar, Shogun, Concorde, F Moser, Pete Tansley, Rocky Mtn, Diamant, Krapf, Marin, Avanti, Winora, Emmelle, Ken Evans
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 275 Post(s)
Liked 417 Times
in
218 Posts
No it's not. You just used the wrong bottom bracket. The bb shell is 5mm too wide and you can get hollowtech bbs that are 5mm narrower. The 73mm mtb ones. Like Deore.
#25
Senior Member
Join Date: Mar 2015
Location: New Zealand
Posts: 1,053
Bikes: Gunnar, Shogun, Concorde, F Moser, Pete Tansley, Rocky Mtn, Diamant, Krapf, Marin, Avanti, Winora, Emmelle, Ken Evans
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 275 Post(s)
Liked 417 Times
in
218 Posts
I already did man.
Look, i took a photo. Right and left are the same 73 mm 'mtb' bb, left has a 2.5 mm spacer on it. Middle is a road bb. Does this make it clear? They fit the same cranks. The mtb ones are 10 mm wide, the road ones are 12.5 mm wide. There are also bbs for italian shells, which are 11.5 mm wide because italian bb shells are 70mm. They all fit the same cranks.
Btw 'mtb' bbs will often say 68/73 because you can run those 2.5 mm spacers and use them in a 68 frame.
Look, i took a photo. Right and left are the same 73 mm 'mtb' bb, left has a 2.5 mm spacer on it. Middle is a road bb. Does this make it clear? They fit the same cranks. The mtb ones are 10 mm wide, the road ones are 12.5 mm wide. There are also bbs for italian shells, which are 11.5 mm wide because italian bb shells are 70mm. They all fit the same cranks.
Btw 'mtb' bbs will often say 68/73 because you can run those 2.5 mm spacers and use them in a 68 frame.