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Old 07-14-08, 12:33 AM   #1
phoshizzo
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Need help finding a 20x1 3/8" slick tires

My 7 year old son is going to be doing a triathlon which has a 5k (3mile) bike leg. He's pretty fast on his mini bmx bike which has a pair of Tioga knobbys on it. I hoping to find a supplier where I can order some 20x1 3/8" city slick tires to give him a little less rolling resistance for the bike ride on the road.

Does anyone know a brand/website where I can get some 20x1 3/8 slicks/city tires?

thanks
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Old 07-14-08, 04:02 AM   #2
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They're pretty common for recumbent riders I believe (at least, relatively speaking, since recumbent riders aren't that common themselves). Most bigger bike stores, online or otherwise, can probably get some for you if they don't already have any in stock.
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Old 07-14-08, 07:50 AM   #3
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How about these.
http://www.danscomp.com/444089.php?cat=PARTS
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Old 07-14-08, 08:00 AM   #4
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Too wide...I'm looking for the skinny 1 3/8" wide 20" tires that will fit the mini bmx bike rims

thanks
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Old 07-14-08, 09:01 AM   #5
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Oh i forgot about that.
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Old 07-14-08, 09:08 AM   #6
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just check some local dealers. if they dont have em, then they can order em and theyll be in 2 wks later at the most. and try to get something really high psi because the higher the psi, the less rolling resistance there is. that would help him even more.
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Old 07-14-08, 11:49 AM   #7
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Maybe try the Intense Micro Knobby? They are very low-profile knobbies.
http://www.danscomp.com/442157.php?cat=RACE

Oh - check this, Primo slics in 1-3/8"
http://www.danscomp.com/442075.php?cat=RACE
-Bill
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Old 07-14-08, 12:26 PM   #8
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I was going to recommend the Primo Slics but wds178 beat me to it.
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Old 07-14-08, 01:14 PM   #9
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Minichamp i was too.
I was lookin at my dans comp magazine and saw those.
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Old 07-14-08, 03:17 PM   #10
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those would be like perfect for what this guy wants to use em for.
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Old 07-14-08, 08:44 PM   #11
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Why do you think they were recommended?
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Old 07-14-08, 10:10 PM   #12
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i dunno. i just like to point out the obvious haha.
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Old 07-14-08, 11:15 PM   #13
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Thanks for the links. I'm going to be ordering some Primo tires.
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Old 07-15-08, 09:44 AM   #14
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Good luck to your son, too.
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Old 07-15-08, 11:31 AM   #15
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My Trek trailer runs 20" tires. It has Kendas on it that are basically slick with some sort of groove zig zagging around on them.

Might be this Kenda Kwest. Not sure as I am at work and the trailer is at home.

http://www.biketrailershop.com/catal...est-p-213.html

Here is another

http://www.ebikestop.com/primo_recum...ire-TR6029.php

Try searching for recumbent tires. Many of them are 20"
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Old 07-17-08, 10:52 AM   #16
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While the OP has his answer, I thought I would point out to the recumbent/trailer posters that a kids BMX race bike uses a 451mm rim and most recumbents and trailers use 406mm.
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Old 07-18-08, 03:04 AM   #17
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BMX is 406mm.
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Old 07-18-08, 08:40 AM   #18
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BMX are 406mm, is that so? Apparently you don’t get out to the race tracks much.

There are 4 common rim sizes for BMX Racing
451mm – these are the narrow 20 inch rims for kids race bikes
406mm – the common 20 inch size, most racers move to this size at age 13 – 14
520mm – kids 24 inch cruiser class
507mm – regular 24 inch cruiser class
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Old 07-20-08, 02:53 PM   #19
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I know this thread is like 2 days old, but how are the skinny rims taller than the wider rims?
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Old 07-21-08, 09:00 AM   #20
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The 20 inch naming convention refers to the outer diameter of the inflated TIRE not the rim, it is also only an approximation, there are few tire rim combinations that are actually 20 inches.

If you do the conversion from millimeters to inches you will see that 406mm is actually only 16 inches, this means that to get a 20 inch diameter you need a tire that has a sidewall height of 2 inches. When you put that tire on the rim you add the 2 inches at the top and bottom giving you a 20 inch diameter. In reality 20 inch tires range in diameter quite a bit but they refer to all of them as 20. For example, kids race tires come in 20 * 1 1/8 and 20 * 1 3/8, the narrower one has a 20 inch diameter but the wider one has a 21 inch diameter. The same is true of the wider tires, two common sizes on race bikes are 20 * 1.5 and 20 * 1.75, these have inflated diameters of 19.25 and 19.5 respectively. Check this next time you are at a track, it is pretty obvious during gate practice when there are kids and older riders on the gate at the same time.

It is also obvious if you ever try to use any of the gearing charts as the gearing is impacted by your inflated tire diameter.
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Old 07-28-08, 12:30 PM   #21
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Oldish thread, but I'll second a vote for the Intense Micro Knobbies... I put them on my old Triumph folder, which takes 20 x 1 3/8", and they're great on the road.
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