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Old 03-19-03, 09:58 PM   #1
lawrence
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mtb rims/tires questions

Hello,

I'm going to be commuting a little bit more this spring with my '02 Haro Escape 8.3. It's pretty much stock right now, and I'd like to swap out the knobby tires it has on it for some more suitable for urban/road riding.

The rims are Sun Rhyno Lite 32h, and the tires on it are Intense 2.25" CC 70 tpi.

My friend just got a set of Specialized Nimbus Armadillos and loves em. However, if I went out and bought the same tires, how would I know if they would fit my rim? I see that there are different sizes, but I'm having trouble figuring out what size my rim is. I thought that there would be something on the rim that says, but all I can figure out is "559 x 27mm".

I'm assuming that the 27mm is the width, and the 2.25" is the height above the rim, is that correct? If so, I cant seem to find much to choose from with that width of 27mm. Most that I can find are 26mm.

Does this mean that I'm going to have to switch out rims? Im not opposed to that because I would love to just be able to pop in the new set whenever Im going off-road. However, I'd prefer to be able to buy a new set of tires for now, and save up a bit for later on.

I hope that is clear, and I appreciate any help I can get.

Thanks,

Lawrence
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Old 03-19-03, 10:20 PM   #2
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I think that most MTB rims are the same width except for some extreme downhill rims, that might be slightly wider, but I am just guessing about the second part.
I have a pair of Michelin wild grip city for my bike, they are 26x1.5 and go up to 80psi/5.5bar. Thinner tyres are available but they will give a harsher ride due to the increase in tyre pressure. They will also need thinner tubes which can be hard to find.

CHEERS.

Mark
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Old 03-19-03, 10:28 PM   #3
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Your rim size is 26" You can put on them a 1" to a 2.125" street tire quite easily. Depending on how much you want to spend you can obtain either a generic treet tire for say $8 to $10 each or spend up to $40 each for kevlar beaded or carbon aramid beaded tires. Tubes if you live in the u.s for above mentioned tires should be no problem.
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Old 03-19-03, 10:36 PM   #4
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The Nimbus comes in 26x1.5 It will fit your Rhynolites but you will need narrower tubes as your current tubes won't fit. You can get both the tires and the tubes at the same time which will save you the second run to the bike shop. I've been using the Nimbus EX's for almost a year now and haven't had any problems in fact they still have the minor side ridges which on lesser tires are worn off in the first couple weeks. I will say this however they are a B!TCH to put on they have a tight bead which helps with the increased pressure they take but swapping them on and off can be a pain. (Part of my justification for buying a new trail bike.)


edit: add on below + A touch of underlining

I don't recommend anything smaller than the 26x1.5 Nimbus because the Rhynolytes are wider than the average 26" rim and could make for a bad fit.
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Old 03-20-03, 04:41 AM   #5
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Check out
http://www.sheldonbrown.com/tire-sizing.html
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Old 03-20-03, 09:25 AM   #6
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Thanks for the advice everyone.

I *think* I understand the sizing now. Would I be better off with a set of Town and Countries from Continental [http://www.conti-online.com/generato...ountry_en.html] ? I think I have seen some good reviews of them and they come in a 26 x 1.9 and a 26 x 2.1 size.

Also, would I be better off in the long-run buying another wheelset?

Thanks again,

Lawrence
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Old 03-20-03, 07:13 PM   #7
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Raiyn,
The Sun Rhyno Lite's width is 24.5 another rim from Sun the Sub IV in which I have run bth 1.5" and 1" tires on is 27.5mm wide. Mavic rims by comparison from their website has a chart for the competition xc rims for tire sizes ranging from 1.0 to 2.30. Now of course it is different for the extreme series of rims that they make. Ambrosio rims however makes a DH rim that is obviously wider with several XC rims that are very close by less than 1.5mm in width.
So in essence you could get away with running smaller than 1.5 tires on several manufacturers rims that are wider or just a wide as Sun Rhyno Lites. Tioga City Slicker also makes sevral width's in a street tire, as do many generic tires such as Pyramid, Summit, etc.
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Old 03-20-03, 08:40 PM   #8
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Lawrence,

Your rims are 26" rims. You don't want the the tires that will fit the 27" rims that you have talked about earlier. The 2.5" on the current tire is not the height of the tire, but the width. You may need smaller tubes depending on what tire size (width) you switch to, as mentione earlier. Tubes will say on the box which tires widths they fit best with. I also have a Rhyno Lite, but haven't switched to skinnier tires. Like mentioned in earlier posts, this could be a concern with the width of the Rhyno Lite rims as they are wider than some other XC rims. 1.5" is getting pretty skinny. Checking the reviews on www.mtbr.com might shed some light on what width rims that have been used successfully on. I think there was a post a little while ago about incompatibility of really skinny slicks with wider MTB rims like the Rhyno Lites. Might be worth a search of the forums...Good Luck!

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Old 03-20-03, 09:12 PM   #9
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When you said, "urban/road" riding, did you mean "urban" as in urban assault? IOW, will you be jumping down stairs, hoping onto planters...etc. Or do you mean simply just "riding on the road"?

The difference being if you're into urban assault, you want a big fat squishy tire with low air pressure.

If you are going to use your bike more as commuter, you want thin and fast, which means high pressure. I'd suggest getting no bigger than a 1.5 and at least rated for 90 p.s.i. You can find some 1" tires, but they'll be really small on your rhino lytes. Stick to a min of 1.25".

Go ahead and buy some tire levers, you'll need them as like mentioned, slicks are a beech to put on some rims.

L8R
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Old 03-21-03, 02:28 AM   #10
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Quote:
Originally posted by Precision Pedal
Raiyn,
The Sun Rhyno Lite's width is 24.5 another rim from Sun the Sub IV in which I have run bth 1.5" and 1" tires on is 27.5mm wide. Mavic rims by comparison from their website has a chart for the competition xc rims for tire sizes ranging from 1.0 to 2.30. Now of course it is different for the extreme series of rims that they make. Ambrosio rims however makes a DH rim that is obviously wider with several XC rims that are very close by less than 1.5mm in width.
So in essence you could get away with running smaller than 1.5 tires on several manufacturers rims that are wider or just a wide as Sun Rhyno Lites. Tioga City Slicker also makes sevral width's in a street tire, as do many generic tires such as Pyramid, Summit, etc.
I agree they'll fit the Rhyno's just fine. However, I feel I need to clarify, what I said was the AVERAGE 26" rim. I was also taking into account other (usually cheaper) wheelsets that tend to be more prevalent on bikes turned to commuter duty which can and does include non MTB's. Just as an example my Rhyno's are quite a bit wider than the Weinmann 519's I run on my commuter bike.
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Old 03-21-03, 10:42 AM   #11
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Thanks for the replies everyone, they helped a bunch.

What i meant by 'urban' was that I will be riding this on the streets of nyc. I dont intend to ride down any stairs or anything like that. The most dangerous thing that I'd have to look out for are potholes (even on the bikepaths). I mainly ride for exercise and fun.

The tires that are on it right now are very knobby; obviously meant for other duties. When I was riding in the light rain the other day, I lost traction a few times because I didnt have much tread actually touching ground. What I'd like is a decent tire that is resistant to punctures and flats and will help keep me upright during foul weather.

My LBS did recommend the 1.9 Town and Countries @ around 45-50 psi to me. He cited that they last a while, have decent resistance to punctures and have a lot of tread contacting the pavement. I guess I could try them, and if they dont work out for me, try to sell them.

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Old 03-21-03, 10:51 AM   #12
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I'd suggest running with a tire that can handle a bit more pressure. I've got a set of Michelin Wild City's or something or other. They're a 1.5 tire and can are rated up to 80 p.s.i. I use these on my mtn bike with Mavic D321 rims, and they work fine!

L8R
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Old 03-21-03, 03:11 PM   #13
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T&C's are good, but look at some of the tyres made by Panaracer (Pasela). Also, for the ultimate in puncture protection, anything with the Armadillo brand by specialized is hard to top.
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Old 03-22-03, 01:49 AM   #14
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Just skip the Hemisphere Armadillos
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Old 03-23-03, 10:32 AM   #15
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Thanks, you guys are the best.

I will probably go with those conti town and countries; when i went to the LBS for a tune up yesterday, there was another rider for the same thing. After the LBS was done with his tuneup, he offered to let me ride his bike around for a bit and try out the tires. They seemed to work pretty well, and he said that he hadnt had a flat since he had them.
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