[bpotsy]

i'm upgrading the brakes on my 94 trek 9800 OCLV and i ran into a problem with the rear brake. the existing rear brake mount on the frame is just a threaded hole, and the boss is part of the the canti brake arms. my new v-brakes need a standard boss to mount on.

does anyone know where/ if i could find a standard v-brake boss that is threaded so i can screw the boss into the mounting hole on my frame?

does that make sense? i'll upload a picture tonight to clarify...

edit:

after some searching, it looks like i just need some brake studs. does anyone know what size and/ or thread pitch i'm going to need? i'm guessing M10, but unsure of thread pitch...

 

[L-Train]

Good Luck

Hopefully your frame is setup to take run of the mill brake studs (M10x1.25or M8x1.25). If so it should be an easy upgrade.
I have a frame with rear brake mounts similar to what you're describing and there are no brake studs that fit my frame.

 

[bpotsy]

how is the thread pitch measured? is it 1.25mm between thread edges? i can measure the thread on the canti arm to see if it is a standard size

 

[Shayne]

Yup.

See Illustration.

 

[bpotsy]

is that pitch gage a pretty standard thing, like my LBS or hardware store would have one?

 

[First Flight]

If you removed the brakes from the bike, the studs should still be inside the brake. Sometimes instead of the brake bolt unthreading from the brake stud, the stud unthreads from the frame.

 

[Shayne]

Yes

Doubtful that the average LBS has one but I know a few that do.
Any hardware store should have a thread gauge.
Mom and pop hardware stores are likely to have one that you could use as opposed to buying one.

 

[bpotsy]

If you removed the brakes from the bike, the studs should still be inside the brake. Sometimes instead of the brake bolt unthreading from the brake stud, the stud unthreads from the frame.

yeah, thats what i thought i did at first. but, the stud and brake bolt are all one bolt.

 

[Zanetti]

yeah, thats what i thought i did at first. but, the stud and brake bolt are all one bolt.

They aren't.

I know it looks that way, but I can assure you that if you hold the threaded section carefully, the cantilever arm mounting bolt will unthread from the boss.

 

[bpotsy]

They aren't.

I know it looks that way, but I can assure you that if you hold the threaded section carefully, the cantilever arm mounting bolt will unthread from the boss.

man, i hope you're right. i'll check it out tonight when i get home...

 

[filegiant]

They aren't.

I know it looks that way, but I can assure you that if you hold the threaded section carefully, the cantilever arm mounting bolt will unthread from the boss.

I'd agree. Someone must have got over-zealous when tighting down on the canti mounting bolt, forgot to lubricate the threads, added too much Loc-Tite, or all three. I've never seen a Trek with anything but standard mounting bolts/studs. Post a picture if you have any trouble.

Aaron

 

[bpotsy]

cool. i think i'll post some pics of the whole bike tonight regardless. i got the bike on ebay about 2 years ago, and the guy i bought it from was the 2nd owner, so he wasnt sure of the year it was made. i have always thought it was a '94, but never really was sure. maybe one of you guys on this forum could help me figure it out...

 

[grawbass]

cool. i think i'll post some pics of the whole bike tonight regardless. i got the bike on ebay about 2 years ago, and the guy i bought it from was the 2nd owner, so he wasnt sure of the year it was made. i have always thought it was a '94, but never really was sure. maybe one of you guys on this forum could help me figure it out...

I have a 94 also. Mine says Gary Fisher on it but its just a Trek 9000 series with different paint and decals. The year is stamped into the inside of one of the dropouts. I can't remember which side, but it should say 94 not 1994.

 

[Zanetti]

cool. i think i'll post some pics of the whole bike tonight regardless. i got the bike on ebay about 2 years ago, and the guy i bought it from was the 2nd owner, so he wasnt sure of the year it was made. i have always thought it was a '94, but never really was sure. maybe one of you guys on this forum could help me figure it out...

I can definately help you pinpoint the model year. I've got the Trek catalogs from '94 thru '00.

Is it green with the shift cables routed under the BB? If yes, it's a '94.

Starting in '95 the OCLV hardtails got top tube cable routing.

 

[bpotsy]

ok, so i'm a dumbass, the brake bolt WAS stuck in the boss, they came apart and i got the v-brake on.

here's some pics. alot of stuff has been swapped out from when i got it 2 years ago: new carbon setapost, seat w/ Ti rails, stem, carbon bars, lock-on grips, carbon bar ends, R7 80mm fork, SD7 v-brakes and cables. i have new wheels (Stan's ZTR 355, DT 240s, DT supercomps) coming in the mail too.

since the integrated XT brake levers/ shifters are v-brake compatible (need to find those half-moon inserts), i think i'm going to leave the 7 speed XT drivetrain for now, and use a spacer for the 7 speed cassette on the new 9 speed hub. the existing cassette is 12-28, and i just got a new 7 speed SRAM 12-32 cassette to put on the new wheels when they come. thinking of maybe a new crankset next, or at least some more standard size chainrings...the existing chainrings are 46/36/28.

one of the pics is of the original shock. the shift cables are routed under the BB, but it's not green...and i dont see a date on the dropout. let me know what year you think the bike is...

also, do you think its worth listing the old parts i took off on ebay, do they have any value cause i guess they are vintage...

 

[Zanetti]

Based on the cranks and rear derailleur, color of the frame and the 'Trek' decals, I'd say 1993.

Deore XT got redesigned into a 'compact' group and gained another cog, making it eight speed, in 1994.

You could try ebay, vintage part values can vary depending on how bad someone really wants it.

 

[bpotsy]

so, a '93, wow...what year did trek start making OCLV MTB frames?

 

[Shayne]

1993

I'm pretty sure 1993 was the first year OCLV frames of any kind were available to the public.
They had a horrible track record here in WI

 

[grawbass]

I can definately help you pinpoint the model year. I've got the Trek catalogs from '94 thru '00.

Is it green with the shift cables routed under the BB? If yes, it's a '94.

Starting in '95 the OCLV hardtails got top tube cable routing.

Mine is a 94 (stamped on the dropout) but it has top tube cable routing.

The catalog probably shows 95s that were actually built in 94, with the top tube routing.

The 94s in the catalog were probably built in 93.

 

[bpotsy]

heh, thats good to know. well, mine seems to be holding up ok so far...maybe it's the cold weather up there...

i wonder if they would still give me a new OCLV as a replacement if mine broke. don't these frames have a lifetime warranty?