Tires and wheels

Frank P. Patterson said:

... Aside from the fact that very few manufacturers produce such a thing, what downside is there
to using 24" wheels? The only ones not BMX that I could find are the Falcon Accel Wheel*. These
would certainly be the choice for anyone interested in that as yet not established category of
recumbent, the 'middi racer'. Dual 24" discs at under 1000 gr. sounds cool to me.

Which 24" wheel size are you referring too: ISO 520-mm "road" size (Terry bikes, first generation
Vision Saber), or ISO 507-mm (juvenile MTB and adult BMX)?

Tom Sherman – Close to 41½ N, 90½ W

Tom Sherman said:

Which 24" wheel size are you referring too: ISO 520-mm "road" size (Terry bikes, first generation
Vision Saber), or ISO 507-mm (juvenile MTB and adult BMX)?

Tom Sherman – Close to 41½ N, 90½ W

Falcon lists their wheel at 531mm X 19mm.

Frank P. Patterson said:

Tom Sherman said:

Which 24" wheel size are you referring too: ISO 520-mm "road" size (Terry bikes, first generation
Vision Saber), or ISO 507-mm (juvenile MTB and adult BMX)?

Tom Sherman – Close to 41½ N, 90½ W

Falcon lists their wheel at 531mm X 19mm.

Whatever else their merits are as a manufacturer of bicycle wheels, Falcon Composites Corp. has a
really bad web page.

The Accel rim is listed as follows:

700C 26 INCH 24 INCH 24 INCH HOOKER NOMINAL WEIGHT 679g 535g 415g 400g HEIGHT 622mm
582mm 531mm 531mm WIDTH 19mm 19mm 19mm 19mm

While the 700C size has a bead seat diameter of 622-mm, there are no tire sizes known to Sheldon
Brown [1] that have either a 582-mm or a 531-mm bead seat diameter. It is unclear whether the "26
inch" is an ISO 571-mm (650 C) or an ISO 559-mm (MTB size) rim and whether the "24 inch" is an ISO
520-mm or ISO 507-mm rim.

I would require a confirmation of the actual ISO sizes of these rims before considering
their purchase.

[1] < sheldonbrown.comtire sizing.htmlOpen ↗ >

Tom Sherman – Close to 41½ N, 90½ W

Tom Sherman <[email hidden]> wrote in message news:<[email hidden]-
berlin.de>... <snip>

Quoted message said:

Whatever else their merits are as a manufacturer of bicycle wheels, Falcon Composites Corp. has a
really bad web page.

The Accel rim is listed as follows:

700C 26 INCH 24 INCH 24 INCH HOOKER NOMINAL WEIGHT 679g 535g 415g 400g HEIGHT 622mm
582mm 531mm 531mm WIDTH 19mm 19mm 19mm 19mm

While the 700C size has a bead seat diameter of 622-mm, there are no tire sizes known to Sheldon
Brown [1] that have either a 582-mm or a 531-mm bead seat diameter. It is unclear whether the "26
inch" is an ISO 571-mm (650 C) or an ISO 559-mm (MTB size) rim and whether the "24 inch" is an ISO
520-mm or ISO 507-mm rim.

The Falcon Accel disc wheels are tubular-only, so those sizes are somewhat correct. The "700C"
listing is incorrect- the outside diameter should be 633mm, I think. The other wheels interchange
with 650C (ISO 571mm) and 24" (ISO 520mm).

There was a gent advertising a bunch of 24" rims and tires (ISO 520) on rec.bicycles.marketplace a
couple weeks back. They're still freakin' rare, though.

Jeff

Jeff Wills said:

Tom Sherman <[email hidden]> wrote in message news:<[email hidden]-
berlin.de>... <snip>

Quoted message said:

Whatever else their merits are as a manufacturer of bicycle wheels, Falcon Composites Corp. has a
really bad web page.

The Accel rim is listed as follows:

700C 26 INCH 24 INCH 24 INCH HOOKER NOMINAL WEIGHT 679g 535g 415g 400g HEIGHT 622mm
582mm 531mm 531mm WIDTH 19mm 19mm 19mm 19mm

While the 700C size has a bead seat diameter of 622-mm, there are no tire sizes known to Sheldon
Brown [1] that have either a 582-mm or a 531-mm bead seat diameter. It is unclear whether the "26
inch" is an ISO 571-mm (650 C) or an ISO 559-mm (MTB size) rim and whether the "24 inch" is an ISO
520-mm or ISO 507-mm rim.

The Falcon Accel disc wheels are tubular-only, so those sizes are somewhat correct. The "700C"
listing is incorrect- the outside diameter should be 633mm, I think. The other wheels interchange
with 650C (ISO 571mm) and 24" (ISO 520mm).

There was a gent advertising a bunch of 24" rims and tires (ISO 520) on rec.bicycles.marketplace a
couple weeks back. They're still freakin' rare, though.

Jeff

A conversation with Falcon today reveals that their 24" wheelsets are for track use only and they
have no way to set the rear wheel up for anything but a single cog. The rims are an aramid material,
thus suitable for braking. They will sell a pair for $1400.00; not too bad for the remarkable
weight. But there is still the tire issue. Too bad; what an interesting 'middi-racer' that would be
on, say a T-bone. Could be set up at under 20 lbs or 9 Kg with standard components @ about $2100.
for the components. You know; FSA carbon cranks,avid brakes,speed play Ti pedals, pc99hp chains,sram
shorty rocket shifters, shimano xtr derailleurs, spinergy xaero 650 wheels.

"Frank P. Patterson" <[email hidden]> wrote in message news:<kmHIb.263867$Ec1.9105814@bgtnsc05-
news.ops.worldnet.att.net>... <snip>

Quoted message said:

A conversation with Falcon today reveals that their 24" wheelsets are for track use only and they
have no way to set the rear wheel up for anything but a single cog. The rims are an aramid
material, thus suitable for braking. They will sell a pair for $1400.00; not too bad for the
remarkable weight. But there is still the tire issue. Too bad; what an interesting 'middi-racer'
that would be on, say a T-bone. Could be set up at under 20 lbs or 9 Kg with standard components @
about $2100. for the components. You know; FSA carbon cranks,avid brakes,speed play Ti pedals,
pc99hp chains,sram shorty rocket shifters, shimano xtr derailleurs, spinergy xaero 650 wheels.

The single-cog issue is comparitively easy to get around. The Varnas use a two-stage drivetrain with
the cassette mounted to the frame and a second chain driving the cog on the wheel. Interestingly,
the latest Varnas use 24" wheels front and rear.

Chucks has 650C disc wheels for cheap: chucksbikes.comwh009.htmOpen ↗
chucksbikes.comwh008.htmOpen ↗

Jeff

Tom Sherman said:

Which 24" wheel size are you referring too: ISO 520-mm "road" size (Terry bikes, first generation
Vision Saber), or ISO 507-mm (juvenile MTB and adult BMX)?

or ISO 540 - common wheelchair size or ISO 541 - aka 600A

--

Dave Larrington - legslarry.beerdrinkers.co.uklegslarry.beerdrinkers.co.ukOpen ↗
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Editor - British Human Power Club Newsletter
bhpc.org.ukbhpc.org.ukOpen ↗
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