A Cycling & bikes forum. CycleBanter.com

Go Back   Home » CycleBanter.com forum » rec.bicycles » Recumbent Biking
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

Availability of Better Wheel and Tire Sizes



 
 
Thread Tools Display Modes
  #1  
Old February 1st 07, 06:06 PM posted to alt.rec.bicycles.recumbent
32GO
external usenet poster
 
Posts: 78
Default Availability of Better Wheel and Tire Sizes

In the 'Low Cost SWB Comments?' topic, Buck wrote:

Be aware that 451 rims mean being restricted to
Schwalbe [Stelvio] or Primo Comets.


I'm pretty sure that Kenda introduced a 451 Kwest late
last year, but they no longer sell direct to dealers,
and my distributor doesn't carry that size. There are
a few other tires from other makers, but they all seem
to be 28mm wide or so. I guess that's in keeping with
the original concept of the 451mm rim, which is called
a 20" although it's two inches larger than the (now) much
more common 406mm (BMX) rim. The reason for that oddity
is of course that US tire sizing is based on the rolling
diameter, which for a 20"X1-1/8" (28X451mm) tire should
be about the same as a 20"X2.25" (57X406mm). There is
also a problem with availability of wide (18mm), eyeleted
double-walled rims in the 451 size, which would (IMHO) be
the best choice for rims for mounting wider tires.

It would REALLY be nice if we recumbent riders had better
options for wheels and tires between the 406 and 559
sizes. With reasonably standard (i.e., cost effective)
gearing, the high gear of a bike or trike with a 406 drive
wheel is typically less than 90 inches - 52T chainring X
18.5" to 19" actual tire diameter / 11T cog. With a 35 to
40 mm wide tire on a 451 rim and a 56T big ring, that
could fairly easily be bumped to 105 inches. That's an
important jump, since a lot of folks we ride with 'spin
out' with an 85" top gear (80 RPM at 20 MPH).

The availability of tires for the 507mm (wide 24") rim
size is probably a little worse than for 451s, but that
seems to me to be almost the ideal for a 'bent drive
wheel. A common road triple (30-42-53) crankset with a
23" tire would give us a gear range of 20 to 110 inches.
Yet, the wheel would be stiffer than a 559 (much less a
700C!), and for a tadpole rear tire size would not be
the limiting item for rolling it into a small station
wagon, for example.

Anyway... two cents worth (or less) from my soapbox;
thanks for your patience.

Regards,
Wayne

Ads
  #2  
Old February 2nd 07, 04:56 AM posted to alt.rec.bicycles.recumbent
32GO
external usenet poster
 
Posts: 78
Default Availability of Better Wheel and Tire Sizes

Hey team -

Sorry for the extra message to you newreader types. I'm
just bumping this thread back up in web-based archive
ahead of the latest round of SPAM from the anonymous
jerk, who will hopefully now consider his duty done till
March at least. Please be patient and hang in there
with us.

Regards,
Wayne

  #3  
Old February 2nd 07, 05:24 AM posted to alt.rec.bicycles.recumbent
Edward Dolan
external usenet poster
 
Posts: 14,212
Default Availability of Better Wheel and Tire Sizes


"32GO" wrote in message
oups.com...
Hey team -

Sorry for the extra message to you newreader types. I'm
just bumping this thread back up in web-based archive
ahead of the latest round of SPAM from the anonymous
jerk, who will hopefully now consider his duty done till
March at least. Please be patient and hang in there
with us.


Here is the first note of criticism I have ever heard from Wayne Leggett on
the SPAMMING TROLL. Maybe there is some hope for this group yet!

Regards,

Ed Dolan the Great - Minnesota
aka
Saint Edward the Great - Order of the Perpetual Sorrows - Minnesota


 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Wheel sizes iridemymuni Unicycling 6 March 26th 06 07:58 AM
Wheel Sizes Dave UK 7 September 7th 05 09:28 PM
Cranks and wheel sizes. Beener Unicycling 6 June 13th 05 10:14 PM
Trek bike weights and tire sizes - ping Mike Jacoubowsky? jj General 7 January 19th 05 12:10 AM
Tube vs Tire sizes Jesse Falsone Techniques 7 December 31st 04 02:58 AM


All times are GMT +1. The time now is 03:34 AM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 CycleBanter.com.
The comments are property of their posters.