Trike gearing

Wally said:

What do folks think of using hub gearing on a recumbent trike, with a single
cog on the front?

I'm sure Mr Tosspot will be along sometime soon to tell you all about his.

Googling for anthrotech & schlumpf might turn up some of his posts to
keep you busy until he appears.

Wally said:

What do folks think of using hub gearing on a recumbent trike, with a
single cog on the front? I've been wondering if one of the seven or
eight speed hub gears that are available for around £100 would give
enough range for general purpose use. (26" rear wheel, no idea how
many teeth on the front.)

Really depends on your legs and the hills in your area. For an example, I
have friends who ride single-speeds alongside me, yet I use most of the 21
gears on my tourer (~27inch to ~100inch range) when riding with them.

To work things out for yourself, use Sheldon Brown's gear calculator. Set
it to "gear inches" because that's what most people in teh UK understand.
Put in the gearing and wheel size of your current favourite steed. Print the
results. Then try putting in your proposed hub gear (Sheldon lists most of
them) for the trike. Print those results. And compare... A few
gear-inches makes no difference, but if you find you need <27in to go up
hills and 100in down, you'll probably find that 7 or 8 speed hubs are not
wide enough range for your needs (solution being either the Schlumf bottom
bracket gear or the Rohloff rear hub, both considerably more than £100)

- Nigel

--
Nigel Cliffe,
Webmaster at http://www.2mm.org.uk/

Nigel Cliffe said:

Wally said:

What do folks think of using hub gearing on a recumbent trike, with a
single cog on the front? I've been wondering if one of the seven or
eight speed hub gears that are available for around £100 would give
enough range for general purpose use. (26" rear wheel, no idea how
many teeth on the front.)

Really depends on your legs and the hills in your area. For an
example, I have friends who ride single-speeds alongside me, yet I
use most of the 21 gears on my tourer (~27inch to ~100inch range)
when riding with them.

To work things out for yourself, use Sheldon Brown's gear calculator.
Set it to "gear inches" because that's what most people in teh UK
understand. Put in the gearing and wheel size of your current
favourite steed. Print the results. Then try putting in your
proposed hub gear (Sheldon lists most of them) for the trike. Print
those results. And compare... A few gear-inches makes no
difference, but if you find you need <27in to go up hills and 100in
down, you'll probably find that 7 or 8 speed hubs are not wide enough
range for your needs (solution being either the Schlumf bottom
bracket gear or the Rohloff rear hub, both considerably more than
£100)

Thanks for that - I'll give it a go once I've got the numbers from my one
and only assembled bike. The hills here vary, but I don't mind coasting down
them, so maybe I can afford to compromise the long end of the gearing.

--
Wally
www.wally.myby.co.uk
http://iott.melodolic.com

Wally said:

What do folks think of using hub gearing on a recumbent trike, with a
single cog on the front? I've been wondering if one of the seven or eight
speed hub gears that are available for around £100 would give enough range
for general purpose use. (26" rear wheel, no idea how many teeth on the
front.)

Trike? I thought you were building a bike based on Hooves-1?

Anyway, IMO you need a lower bottom gear and a higher top gear than you
would on an upright. To do this with a hub gear you either need
something like the new 8-speed S-A with a range of 6 sensibly spaced
gears and off-the-wall top and bottom, or your legs will need to cope
with a very big jump from gear to gear.

You need a lower bottom gear not because you'll be going slower up the
hills but because you cannot stomp the pedals and you've got to spin.
In fact I find my climbing speed a touch higher on my 2-wheel bent than
on the upright, but this way well be due to the better choice of gears
(24-ish vs 7). You need a higher top gear because that's the way to get
the Authentic Recumbent Grin (TM). Coasting down hills doesn't do
it....

Mike

Mike Causer said:

Trike? I thought you were building a bike based on Hooves-1?

I'm building a bike based on Hooves 1.5, and I'm designing the trike.

Quoted message said:

Anyway, IMO you need a lower bottom gear and a higher top gear than
you would on an upright. To do this with a hub gear you either need
something like the new 8-speed S-A with a range of 6 sensibly spaced
gears and off-the-wall top and bottom, or your legs will need to cope
with a very big jump from gear to gear.

That sounds interesting.

Quoted message said:

You need a lower bottom gear not because you'll be going slower up the
hills but because you cannot stomp the pedals and you've got to spin.

Yup.

Quoted message said:

In fact I find my climbing speed a touch higher on my 2-wheel bent
than on the upright, but this way well be due to the better choice of
gears (24-ish vs 7). You need a higher top gear because that's the
way to get the Authentic Recumbent Grin (TM). Coasting down hills
doesn't do it....

I'll bear that in mind. (The Hooves 1.5 thing was a fortuitous opportunity
to try out recumbulating - if I like that, the trike may well turn from CAD
to reality.)

--
Wally
www.wally.myby.co.uk
http://iott.melodolic.com

Wally said:

I'm building a bike based on Hooves 1.5, and I'm designing the trike.

I could have sworn I rode alongside a bike labelled "Hooves 1.5" for some
miles on Friday in Cambridgeshire. Hmmm, maybe Jon has a production line
going.

Quoted message said:

Quoted message said:

Anyway, IMO you need a lower bottom gear and a higher top gear than you
would on an upright. To do this with a hub gear you either need
something like the new 8-speed S-A with a range of 6 sensibly spaced
gears and off-the-wall top and bottom, or your legs will need to cope
with a very big jump from gear to gear.

That sounds interesting.

Both choices sound dreadful to me. But then I have legs that are very
picky about rate of rotation. 80 minimum, and 120 absolute max for
short distances, nowadays (used to do 140, but now it buggers my dodgy
knee).

Quoted message said:

I'll bear that in mind. (The Hooves 1.5 thing was a fortuitous
opportunity to try out recumbulating - if I like that, the trike may
well turn from CAD to reality.)

I tried to look at your CAD pictures, but it's 'Doze only. I might be
installing Wine so I can get Google Earth, so there's a pobisility I could
have a look.

Mike

Mike Causer said:

I could have sworn I rode alongside a bike labelled "Hooves 1.5" for
some miles on Friday in Cambridgeshire. Hmmm, maybe Jon has a
production line going.

Black frame? Wicker basket on the rear carrier?

Quoted message said:

Quoted message said:

That sounds interesting.

Quoted message said:

Both choices sound dreadful to me.

I wouldn't know any better. :-)

I'm just thinking about it as an option - a single front cog and a hub gear
on the rear would make for a cleaner design with virtually no maintenance
needs.

Quoted message said:

I tried to look at your CAD pictures, but it's 'Doze only.

Function of the CAD software. Apparently, they do viewers for non-Windows
OSs.

Quoted message said:

I might
be installing Wine so I can get Google Earth, so there's a pobisility
I could have a look.

Don't know how that would get on with ActiveX controls (I presume the web
viewer is ActiveX), but the eDrawings viewer would probably run okay.

--
Wally
www.wally.myby.co.uk
http://iott.melodolic.com

Wally said:

What do folks think of using hub gearing on a recumbent trike, with a single
cog on the front? I've been wondering if one of the seven or eight speed hub
gears that are available for around £100 would give enough range for general
purpose use. (26" rear wheel, no idea how many teeth on the front.)

I'd say, if you're fit and don't have to tackle anyhting more than
rolling hills it's be OK. On the trike at the moment I mostly ride in
the middle ring and use the 11-32 wide range rear casette to do the work
which is essentially the same as a hub gear with a ~300% range. Problem
is that you might come up against a hill that's too steep or you're too
tired or too heavily loaded to have the right gear for. That's when you
risk buggering you knees by bench pressing your way up the hill.

Personally I'd just stick to a triple chainring and MTB casette same as
everyone else unless you're rich enough for a Speedhub 14 and/or
Schlumpf Drive

Alex

Al C-F said:

Wally said:

What do folks think of using hub gearing on a recumbent trike, with a
single
cog on the front?

I'm sure Mr Tosspot will be along sometime soon to tell you all about his.

Googling for anthrotech & schlumpf might turn up some of his posts to
keep you busy until he appears.

Damn! Too late. Well, it is the one true path, if a bit expensive 🙁

I'm going to slink off and continue the hunt for a lighting system for
it that actually works. I may be gone some time.

Tosspot said:

Damn! Too late. Well, it is the one true path, if a bit expensive 🙁

And i had no idea how expensive until I looked at the Ice web site - *four
grand* for the Eclipse?? I had homed in on that one because it's dimensions
and wheel configuration are closest to the design I'm developing. I'm sure
it's all very good quality, but I don't see what it has compared to their
other models for half the money.

--
Wally
www.wally.myby.co.uk
http://iott.melodolic.com

Alexander Rice said:

I'd say, if you're fit ...

Err...

Quoted message said:

... and don't have to tackle anyhting more than
rolling hills it's be OK.

They're generally rolling, or long and not too steep. There are a few steep
bits, so a low gear would be a good thing, I think.

Quoted message said:

Problem is that you might come up against a hill that's too steep or
you're too tired or too heavily loaded to have the right gear for.
That's when you risk buggering you knees by bench pressing your way
up the hill.

That's a good reason to have a low gear.

Quoted message said:

Personally I'd just stick to a triple chainring and MTB casette same
as everyone else unless you're rich enough for a Speedhub 14 and/or
Schlumpf Drive

I'd say around 100 quid is the max for a hub gear. Are they interchangeable
with normal cassettes?

--
Wally
www.wally.myby.co.uk
http://iott.melodolic.com

Hi

I used to run on a 28/40/52 with an 11-28 rear cassete with a 26" wheel on
the rear of my Windcheetah.

However, for the last year I have changed to a 24/38/48 set of rings and had
the cranks shortened to 140mms.

Although I am 6ft the change to 140 mm cranks makes a big difference both up
hills and on the flat/downhill. I can spin much easier due to the smaller
diameter of the pedal circle. I can sustain a higher pace on each and the
reduction in front small chainring goes some way to offset the higher
gearing moving down from 170 to 140.

If you want to try this without too much expense then St Jons St cycles do a
Sugino 24/38/48 chainset with 154mm cranks at aless than £30.

Best regards

Rod King

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

Quoted message said:

What do folks think of using hub gearing on a recumbent trike, with a

single

Quoted message said:

cog on the front? I've been wondering if one of the seven or eight speed

hub

Quoted message said:

gears that are available for around £100 would give enough range for

general

Quoted message said:

purpose use. (26" rear wheel, no idea how many teeth on the front.)

--
Wally
www.wally.myby.co.uk
http://iott.melodolic.com

in message <[email hidden]>, Wally

(') said:

Alexander Rice said:

I'd say, if you're fit ...

Err...

Quoted message said:

... and don't have to tackle anyhting more than
rolling hills it's be OK.

They're generally rolling, or long and not too steep. There are a few
steep bits, so a low gear would be a good thing, I think.

Quoted message said:

Problem is that you might come up against a hill that's too steep or
you're too tired or too heavily loaded to have the right gear for.
That's when you risk buggering you knees by bench pressing your way
up the hill.

That's a good reason to have a low gear.

Quoted message said:

Personally I'd just stick to a triple chainring and MTB casette same
as everyone else unless you're rich enough for a Speedhub 14 and/or
Schlumpf Drive

I'd say around 100 quid is the max for a hub gear. Are they
interchangeable with normal cassettes?

You might try using a hub gear with a front deraileur. It's not as clean
as a hub gear on its own, but with a chain line as long as a recumbent
trike you could start out with just a hub gear, and, if you found it
wasn't enough, fit a triple chain ring, front derailleur and chain
tensioner later.

The other thing you might look at is the SRAM DualDrive system (I believe
Shimano do something similar) <URL:http://www.sram.com/dualdrive/>

--
[email hidden] (Simon Brooke) http://www.jasmine.org.uk/~simon/

The Conservative Party now has the support of a smaller proportion of
the electorate in Scotland than Sinn Fein have in Northern Ireland.

Simon Brooke said:

You might try using a hub gear with a front deraileur. It's not as clean
as a hub gear on its own, but with a chain line as long as a recumbent
trike you could start out with just a hub gear, and, if you found it
wasn't enough, fit a triple chain ring, front derailleur and chain
tensioner later.

The other thing you might look at is the SRAM DualDrive system (I believe
Shimano do something similar) <URL:http://www.sram.com/dualdrive/>

i have this on my Trice. It is coupled with a 9spd cassette and triple
giving an ultra low 9" gear.

And yes, I have used it.
One can never have too low a gear ;-)

John B

In article <pan.2006.01.21.19.52.53.307918
@firstnamelastname.com.invalid>, Mike Causer

() said:

Anyway, IMO you need a lower bottom gear and a higher top gear than you
would on an upright.

Yes to the low end, but not convinced by the high. I spin out on my
trike at ~55 km/h and if the hill is promising more speed than that, I'm
happy to coast. Mine has a range of 13-87" with a 406 drive wheel.

One day, though, I must properly investigate building a custom
cassette...

--
Dave Larrington - <http://www.legslarry.beerdrinkers.co.uk/>
Murdock's Gardening Law: If it's green, the paving isn't finished yet.

Wally said:

What do folks think of using hub gearing on a recumbent trike, with a single
cog on the front? I've been wondering if one of the seven or eight speed hub
gears that are available for around £100 would give enough range for general
purpose use. (26" rear wheel, no idea how many teeth on the front.)

Hm. Speaking out of ignorance I'd expect a recumbent trike
to be (really)slow up hills and (really)quick downhills
leading to a wide ratio requirment on the gearing.

Rather like a tandem.

BugBear