[Crash_Burn]

Couple of nubee questions -

Anybody have expeience fitting a Titan-Tour with a fatty?

Could'nt find a cut-away drawing for the lip profile.

Do you think it worth giving these rims a second go around?

 

[Guitar Ted]

What rock did you find that under?

Those are some old rims there! They are good rims, just old. Are they NOS? Hmmm......anyway. Yes, those should mount up okay. Most of the old Matrix stuff was a pretty tight fit with anything you tried to mount on it, but we're talking tires up to 40mm only. I think you will find that anything 2.1X 700c will still seem too loose on that rim compared to a 26 inch wheel and tire combo. Good luck!

 

[shiggy]

Those are some old rims there! They are good rims, just old. Are they NOS? Hmmm......anyway. Yes, those should mount up okay. Most of the old Matrix stuff was a pretty tight fit with anything you tried to mount on it, but we're talking tires up to 40mm only. I think you will find that anything 2.1X 700c will still seem too loose on that rim compared to a 26 inch wheel and tire combo. Good luck!

I do not understand your "tight" and "loose" comments. How does the tire width affect how tightly it fits on the rim? Why would tires wider than 40 mm be looser?

 

[Guitar Ted]

Let me explain myself

I do not understand your "tight" and "loose" comments. How does the tire width affect how tightly it fits on the rim? Why would tires wider than 40 mm be looser?

Okay, the old Matrix rims, for whatever reason, were more difficult to mount a tire on- any tire- than other rims of similar design, (touring rims). So, I used the term "tighter". That's my experience, your mileage may vary.

As for tire width, I think it's a generally accepted fact that any of the "true" 29 inch diameter tires, ( 2.1) fit rather "loosely" on most rims. In other words, the bead diameter of these tires would "seem" to be larger than a 40mm or less wide 700c tire. That is what I was trying to say. Matrix rims seemed to require more effort to mount a tire on, and our 29 inch diameter tires seem to have a larger bead diameter. Whether or not 29 inch X 2.1 tires actually do have a larger bead diameter or not, I do not know, but it seems that way.

 

[Bigwheel]

I too have noted through the years the difference in getting a smaller diameter tire mounted on both 26" and 700c.

But when I switched to Nano's in 99' I pretty much tossed my tire levers. I mean try and mount/dismount something like a 25mm road tire and you are looking all over for the tire levers, whereas on the same rim a Nano would slip right on with finger pressure? But I got a flat (my first ever 29" one) trying out an early GF Mt. Tam mounted with Notos tires due to a small nail and could not get the tire off the rim without resorting to using my cool tool philips/hex key, very gingerly I might add. But that is the only 29" tire I have had to use a tool on since, including other Notos.

Given the fact that a 700c rim standard bead diameter is 622mm I am assuming there has to be a certain degree of +/- involved but it can't be much. I have always just thought it had to do with the extra casing involved with the larger tire being more supple but I am not by any means the expert and ready to learn

Oh yeah, the Titan Tour rims should be just fine and you know the price is right.

 

[Crash_Burn]

Thanks Guys!

Oh yeah, the Titan Tour rims should be just fine and you know the price is right.

I'am just getting started building up a BigShot. I'll be having fun with this build, as it's replacing my cruiser/commuter.

So I'll give these rims a second chance at life. They don't seem to have any flat spots and the side walls have plenty of braking surface left. These came off a 1991 Trek hybrid, 750 multitrack.

I've got some older XT hubs laying around that have some life in them, so now all I need is some spokes and nipples. Any suggestions?

 

[shiggy]

Used rims? Unless you are on a really tight budget I would not use them. It can be very difficult to build with a used rim, even if it appears to be straight. Tough to get them true and round.

 

[Crash_Burn]

Good Call

Used rims? Unless you are on a really tight budget I would not use them. It can be very difficult to build with a used rim, even if it appears to be straight. Tough to get them true and round.

Yeah not NOS - I'll see if Brian (local wheel builder) will even give it try. Sad to see the rims go to the trash, but lookin that way.

 

[shiggy]

Yeah not NOS - I'll see if Brian (local wheel builder) will even give it try. Sad to see the rims go to the trash, but lookin that way.

If they are straight at all I would not throw them out. See what your builder says. You could at least build them up with straight gauge spokes for practice and have them for a back-up wheelset. Mount your snow tires on them and no worries about trashing your "good" wheels.