| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 895.1 | Also interested in the answer... | MAILVX::HOOD_DO | | Fri Oct 07 1988 20:18 | 7 |
| Well, I've never done it either, but I know it takes about ten minutes
to change a two inch wide tire. The Avocet city tires come in 1.5
and 2.0 inch sizes. I think 1.5s would present less rolling resistance.
Does anybody have any experience with these tires (or the Fat City
tires)?
|
| 895.2 | sidewall wearout was my problem | AQUA::OCONNOR | The law dont want no gear-gammer | Mon Oct 10 1988 12:45 | 9 |
| Hi,
I just junked an Avocet Fat slik. I was disapointed with the tires
life. The sidewall wore out down near the rim causing a blowout
after just 1k. Other the other hand the tread? looked like it would
last forever.
Joe
|
| 895.3 | .2 | PNO::STARKEY | | Mon Oct 10 1988 13:10 | 8 |
| Do you think the tire was defective, or maybe the break pad rubbed
it or was it run low at some time?? I take it, that the 1k miles
was put in a short time and the tire did not have time to rot..
The bike salesman says just smooths will make all the difference
and my neighbor says to maybe expect no more than 5% gain in his
opinion..any ideas out there??
|
| 895.4 | skinny rear helps a lot! | ENGINE::PAULHUS | Chris @ MLO8-3/T13 dtn 223-6871 | Mon Oct 10 1988 14:53 | 8 |
| Some ATB only riders locally have a touring rim/tire combo [
like a 1 3/8" 27" tire, or 1 1/4"] that they slap on the rear
(most weight) for highway only riding. The only problem is that
the brake for the 26" ATB wheel must be disabled and the connection
switched to the other rear brake that aligns with the 27" skinny
rim. The difference in this combo is evidently MAJOR! Put your
chin on the stem and it's almost as fast as a touring bike (put
a Zzipper fairing on and I'd probably stay with racers). - Chris
|
| 895.5 | various mtn bike tires; | AHOUSE::ACKLEY | Still the King of Nothing | Mon Oct 10 1988 15:09 | 39 |
|
Tires are the easiest change you can make to speed up a bike.
I have two sets of wheels for my mountain bike, and for a while
I had road tires on one set, and knobbies on the other set.
The road tires had much less wind resistance than the knobbies,
I was using at that time, and probably saved my about 15% of
the work... (this was with the same pressure in both sets of tires...)
However, recently I have switched to using the Ritchie kevlar
bead 'force' tires, that can be raised up to 85 lbs pressure.
The knobs are situated such that there is an almost smooth center
line on the tires for good road riding. The high pressure seems
to compensate for the wind resistance of the knobs. I like these
tires for all around riding, since they are fast on the road, and
have fairly good knobs for the dirt. The only things they bog
down in are sand and mud.
So in summary, there are several factors to consider with tires;
1) the max pressure the tire will take, the more the better, on
the road.
2) the wind resistance of the tread, and the rolling resistance.
The rolling resistance (on road) may be decreased if the tread
has a fairly solid (smooth) center line.
3) the weight of the tire. Tires that are made from fine cord
plies (more cords per inch) are better handling, more supple,
and weigh less.
Since all of these factors count, some road tires are quite
poor (some michelins don't take much pressure, though the tread
is nice). Some knobbies are actually fine on the road.
If you want a tire that is great for both road and dirt, try the
Ritchies. The best tires I've seen for riding in sand are
the 'ground control', but the tread pattern drags on the road.
For just road riding, one of my friends tells me he likes his
treadless tires, which are quite smooth, but I have'nt tried
them yet, myself.
Alan.
|
| 895.6 | Try Specialized | GUCCI::MHILL | A Touch Of Gray | Mon Oct 10 1988 16:08 | 5 |
| My old Ross MTB came with a 2.25" tire that has a smoth raised center
section. When riding on the road, I use max psi and ride on the
center tred. Off road, I reduce the pressure and let the knbbies
dig in. Specalized offers a similar tire. Get a copy of their
catelog.
|
| 895.7 | An addendum to 2 | AQUA::OCONNOR | The law dont want no gear-gammer | Tue Oct 11 1988 12:24 | 10 |
| If one tire, BTW it was on the front, was defective and another
tire produced around the same time is still running ok on the rear
then I would say that Avocet has a quality control problem. I have
a couple of 1.5 Crossroads that came with the bike that, outside
of the fact that they are very dirty, look as solid in both the
tread and casing as they did when they were new. They have about
2k on them. They are just a pain to pedal on streets and they really
don't offer all that much traction in the dirt :-(.
Joe
|
| 895.8 | "Diagnosis" for .2's problem | SMURF::BINDER | A complicated and secret quotidian existence | Tue Oct 11 1988 18:24 | 21 |
| Re: .2
> ...The sidewall wore out down near the rim causing a blowout after
> just 1k. Other the other hand the tread...
If the sidewall "wore out," there are only three possibilities. (I
discount poor quality control, because that wouldn't manifest itself
as "wearing out" in the usually understood sense of the word.)
1. A lousy rim, with a sharp edge.
2. Brake pads rubbing on the tire due to misalignment - could the
pad(s) have gotten munged during use off-road?
3. Underinflation. This would cause undue friction between the
sidewall and the rim.
I really doubt it was a defective tire - especially since it's an
Avocet. That company is known for its excellent quality control.
- Dick
|
| 895.9 | one more | PNO::STARKEY | | Wed Oct 12 1988 19:34 | 7 |
| Thanks for all the information..I believe that I will go with the
smooth tires..one more question. While talking with 4 different
bike shops, I got two different answers on the width of the tire.
They say 1.5 and the other says 1.25. Is there a spec on width of
a rims as to what size handles which tires..Right now my tires are
1.95..Would it be stretching it to try a 1.25??
|