Is this usual?

"Gadget" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Recently converted my tyres over to Continental Travel 1.75 on the rear

and

Quoted message said:

Crossroads Ex 1.95 on the front. This was from Continental Vertical 2.3's. After a few test rides
I have come to this conclusion. My speed neither decreases nor increase yet my energy seems to
decrease a little to quick.

I

Quoted message said:

also was able to keep the bike up at 15mph on the CV 2.3's with the knowledge that if I want to I
could push a little harder, but with the slicks 15mph is all about I can manage. I ride an Orange
Gringo, I'm not sure if this makes a difference. Any comments, ideas etc would be appreciated.

Gadget

Hi Gadget. I'd always assumed, that all other things being equal, i.e. pressure etc, the thinner the
tyre, the less friction / drag, the easier it is to accelerate etc. I've got Conti 2.3s on my full
suss MTB but keep them highly inflated to prevent snakebites (I'm heavy ;-). They aren't too bad but
they are very knobbly, so it's not the whole width of the tyre hitting the floor. However, I've also
got a roadbike that has 1.25 on. No comparisson, it flies, but all things are not equal, bigger
wheels, no suspension, different gearing, lighter bike, different surface (tarmac vs. singletrack),
so, no help at all....sorry ;-)

In the meantime..... I've got a friend with an Orange Gringo. It has 24" wheels and 26" tyres. First
time I've ever seen this. Advised he took it back to the LBS. He did and they told him this is how
all Orange Gringos are. I've double checked the numbers on the wheel and tyre. They are right. Is
this the case with yours ? Cheers, Dave.

"Dave" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

"Gadget" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Recently converted my tyres over to Continental Travel 1.75 on the rear

and

Quoted message said:

Crossroads Ex 1.95 on the front. This was from Continental Vertical

2.3's.

Quoted message said:

Quoted message said:

After a few test rides I have come to this conclusion. My speed neither decreases nor increase
yet my energy seems to decrease a little to

quick.

Quoted message said:

I

Quoted message said:

also was able to keep the bike up at 15mph on the CV 2.3's with the knowledge that if I want to
I could push a little harder, but with the slicks 15mph is all about I can manage. I ride an
Orange Gringo, I'm not sure if this makes a difference. Any comments, ideas etc would be
appreciated.

Gadget

Hi Gadget. I'd always assumed, that all other things being equal, i.e. pressure etc, the thinner
the tyre, the less friction / drag, the easier it is to accelerate etc. I've got Conti 2.3s on my
full suss MTB but keep them

highly

Quoted message said:

inflated to prevent snakebites (I'm heavy ;-). They aren't too bad but

they

Quoted message said:

are very knobbly, so it's not the whole width of the tyre hitting the

floor.

Quoted message said:

However, I've also got a roadbike that has 1.25 on. No comparisson, it flies, but all things are
not equal, bigger wheels, no suspension,

different

Quoted message said:

gearing, lighter bike, different surface (tarmac vs. singletrack), so, no help at all....sorry ;-)

In the meantime..... I've got a friend with an Orange Gringo. It has 24" wheels and 26" tyres.
First time I've ever seen this. Advised he took it back to the LBS. He did and they told him this
is how all Orange Gringos are. I've double checked the numbers on the wheel and tyre. They are

right.

Quoted message said:

Is this the case with yours ? Cheers, Dave.

Quick simple answer would be Yes. My rims are 24", my tyres are 26". I keep my CV's at full psi,
same with the slicks that are now on the bike.

Gadget

In "]news:[email hidden], Gadget
<[email hidden]> typed:

Quoted message said:

Recently converted my tyres over to Continental Travel 1.75 on the rear and Crossroads Ex 1.95 on
the front. This was from Continental Vertical 2.3's. After a few test rides I have come to this
conclusion. My speed neither decreases nor increase yet my energy seems to decrease a little to
quick. I also was able to keep the bike up at 15mph on the CV 2.3's with the knowledge that if I
want to I could push a little harder, but with the slicks 15mph is all about I can manage. I ride
an Orange Gringo, I'm not sure if this makes a difference. Any comments, ideas etc would be
appreciated.

I've noticed this as I've recently been having to use my rather posh mountain bike as a general
purpose bike (although there's some ill-fitting ones I can use for just popping into town). I think
that quite a lot of the rolling resistance from knobbly tyres is specific to cheap knobbly tyres
with a stiff carcass under the tread, and that some slicks may also have stiff enough carcasses to
increase rolling resistance(easy way to increase puncture protection).

It could also be that the brakes are rubbing after refitting the wheel slightly differently, but
that's unlikely.

Ambrose

"Gadget" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

<snip>

Quoted message said:

Quoted message said:

Quick simple answer would be Yes. My rims are 24", my tyres are 26". I

keep

Quoted message said:

my CV's at full psi, same with the slicks that are now on the bike.

Gadget

eerrrmmmm...... wtf is going on there then ?...thought 26 wheel required 26 tyre type of thing....
(life is so confusing sometimes!!) cheers, Dave.

Gadget said:

Recently converted my tyres over to Continental Travel 1.75 on the rear and Crossroads Ex 1.95 on
the front. This was from Continental Vertical 2.3's. After a few test rides I have come to this
conclusion. My speed neither decreases nor increase yet my energy seems to decrease a little to
quick. I also was able to keep the bike up at 15mph on the CV 2.3's with the knowledge that if I
want to I could push a little harder, but with the slicks 15mph is all about I can manage. I ride
an Orange Gringo, I'm not sure if this makes a difference. Any comments, ideas etc would be
appreciated.

You haven't recalibrated your computer?

:-)

--

Mark Davies

"Mark Davies" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Gadget said:

Recently converted my tyres over to Continental Travel 1.75 on the rear

and

Quoted message said:

Quoted message said:

Crossroads Ex 1.95 on the front. This was from Continental Vertical

2.3's.

Quoted message said:

Quoted message said:

After a few test rides I have come to this conclusion. My speed neither decreases nor increase
yet my energy seems to decrease a little to

quick. I

Quoted message said:

Quoted message said:

also was able to keep the bike up at 15mph on the CV 2.3's with the knowledge that if I want to
I could push a little harder, but with the slicks 15mph is all about I can manage. I ride an
Orange Gringo, I'm not sure if this makes a difference. Any comments, ideas etc would be
appreciated.

You haven't recalibrated your computer?

:-)

What computer? I rely on GPS for my speedo. Hence the name Gadget. Maybe I'm just going to fast for
the sattelites to keep track. :o)

Gadget

"Dave" <[email hidden]> wrote in news:Z4tua.4948$YW3.4702@news- binary.blueyonder.co.uk:

Quoted message said:

Quoted message said:

Quick simple answer would be Yes. My rims are 24", my tyres are 26". I keep my CV's at full psi,
same with the slicks that are now on the bike.

Quoted message said:

eerrrmmmm...... wtf is going on there then ?...thought 26 wheel required 26 tyre type of thing....
(life is so confusing sometimes!!)

Orange are American, I presume?

I gather that the Americans measure bike rims by the rim diameter, and tyres by the overall rolling
diameter - rather than (like anybody sensible would
do) the rim diameter....

(See my question about VeloSolexes - 19" rim, the French reckon 19" tyre, the Americans 21"...)

Orange are an English Company.

Gadget

In "]news:[email hidden], Dave <[email hidden]> typed:

Quoted message said:

In the meantime..... I've got a friend with an Orange Gringo. It has 24" wheels and 26" tyres.
First time I've ever seen this. Advised he took it back to the LBS. He did and they told him this
is how all Orange Gringos are. I've double checked the numbers on the wheel and tyre. They are
right. Is this the case with yours ?

The wheels commonly known as 26 inches are about 600mm in diameter (24 inches), so that might be the
source of confusion. When you put a tyre on them, then the total diameter should be around 26
inches. So measuring the size of the rim doesn't give you the name of the wheel size. (Although all
rims of a given wheel size are of the same diameter, of course).

There is a little used old fashioned 26 inch wheel size where the tyre sizes are given as, for
example, 26 × 1 3/4 rather than 26 × 1.75, and they have a rim diameter of about 26 inches, just to
confuse the issue.

I'm not aware of any bikes on the UK market that take the larger 26" wheel size, though.

Hope that helps, not confuses.

Ambrose.

There's about seven different "twenty-six inch" sizes in the wild, but some are rarely encountered
in the wild these days. To avoid confusion, use the ISO system giving the rim's bead seat diameter
in millimetres... Sheldon Brown, as usual, hav the low-down:
sheldonbrown.comtire sizing.htmlOpen ↗

Dave Larrington - legslarry.crosswinds.netlegslarry.crosswinds.netOpen ↗
===========================================================
Editor - British Human Power Club Newsletter
bhpc.org.ukbhpc.org.ukOpen ↗
===========================================================

EllieG said:

I gather that the Americans measure bike rims by the rim diameter, and tyres by the overall
rolling diameter - rather than (like anybody sensible would
do) the rim diameter....

I know American-bashing is great fun, but this is by no means an American peculiarity. _All_ of the
old nationality-based cycle tyre sizing systems were based on tyre tread diameters, including the
British, Canadian French German and Swedish systems!

The modern ISO/E.T.R.T.O. system is based on rim diameter, and is very much less confusing
as a result.

See: sheldonbrown.comtire sizing.htmlOpen ↗

Sheldon "Numbers" Brown Newtonville, Massachusetts USA
+-----------------------------------------------------+
| He is a barbarian, and thinks that the customs | of his tribe and island are the laws of nature.
| | --George Bernard Shaw |
+-----------------------------------------------------+ Harris Cyclery, West Newton,
Massachusetts Phone 617-244-1040 FAX 617-244-1041 sheldonbrown.comharrisOpen ↗ Hard-to-find
parts shipped Worldwide

.

Quoted message said:

I know American-bashing is great fun, but this is by no means an American peculiarity. _All_ of the
old nationality-based cycle tyre sizing systems were based on tyre tread diameters, including the
British, Canadian French German and Swedish systems!

The modern ISO/E.T.R.T.O. system is based on rim diameter, and is very much less confusing as
a result.

See: sheldonbrown.comtire sizing.htmlOpen ↗

Sheldon "Numbers" Brown Newtonville, Massachusetts USA

I vote Mr B is banned from the group until his face fungus returns.

(From one who has stood distant from a razor for over a decade, now.)

Iain <FatBlokeOnBike @ mother-truckers.co.uk> wrote in message
news:<[email hidden]>...

Quoted message said:

Quoted message said:

I know American-bashing is great fun...

Quoted message said:

I vote Mr B is banned from the group until his face fungus returns.

Come on, Sheldon, tell us how the guys in the shop reacted. I expect they took it pretty
matter-of-factly. Along the lines of, "Good morning, Mr. Brown. How well you look today."

:-)

--
Dave...

Quoted message said:

Come on, Sheldon, tell us how the guys in the shop reacted. I expect they took it pretty
matter-of-factly. Along the lines of, "Good morning, Mr. Brown. How well you look today."

Not quite. More like "Good morning, sir, how can we help you...oh my GAWD!!!"

Sheldon "Unrecognizable" Brown Newtonville, Massachusetts, Yankeeland
+---------------------------------------------------------------------+
| A man of character finds a special attractiveness in difficulty, | since it is only by coming to
| grips with difficulty | that he can realize his potentialities. -- Charles DeGaulle |
+---------------------------------------------------------------------+ Harris Cyclery, West Newton,
Massachusetts Phone 617-244-9772 FAX 617-244-1041 harriscyclery.comharriscyclery.comOpen ↗ Hard-to-find parts
shipped Worldwide captainbike.comcaptainbike.comOpen ↗ sheldonbrown.comsheldonbrown.comOpen ↗

(Sheldon Brown) said:

Sheldon "Unrecognizable" Brown

I have a theory that you were testing a carbon lowracer and the air friction burned the
whiskers off ;-)

Guy
===
** WARNING ** This posting may contain traces of irony. chapmancentral.comchapmancentral.comOpen ↗ (BT ADSL and
dynamic DNS permitting)
NOTE: BT Openworld have now blocked port 25 (without notice), so old mail addresses may no longer
work. Apologies.

[email hidden] (Sheldon Brown) wrote in message
news:<[email hidden]>...

Quoted message said:

Quoted message said:

Come on, Sheldon, tell us how the guys in the shop reacted. I expect they took it pretty
matter-of-factly. Along the lines of, "Good morning, Mr. Brown. How well you look today."

Not quite.

I think that might be the understatement of the year. :-)

--
Dave...