Thanks Paul and Vi
As far as crank lengths go, 75mm cranks have been fine for me and I
haven't noticed reaching lean limits where one wheel starts to lift.
But the longer cranks definitely shake and lose traction, maybe a bit
like a drift trike. Longer cranks might be fine on simple load trikes
like Vi's though. I like the visibility of your trike Vi!
Good tyres aren't a problem, the 349 rim size is the same as Brompton
and there are also good tyres in the other 16" size which is 305. I
keep on looking for alternative wheels and see some good cantilever
16" wheels on prams and postal delivery carts, but haven't been able
to find the cantilever wheels as spare parts. Hubs aren't really a
problem as there is now through axle technology for 12 and 15mm sizes,
as well as 14mm bmx. An example of wheels I use are here [1], in
Australia these are for pedal prix trike wheels.
There's quite a lot of new stuff in the Cycle Zoo book, and the whole
chapter on leaning trikes is new. A few women friends have contributed
chapters so its a bit more accessible, and also I have a bit more
coverage of 3d printing. The ebook version is the cheapest and
quickest to access, but print on demand is also possible and often
won't involve shipping printed books all the way round the world.
Either way is better than what I did for the previous version which
was to get 1000 printed locally and then have to mail them off.
Regards
Steve Nurse
modularbikes.com.au
----- Original Message -----
From: python@xxxxxxxxxxxxx
To:
Cc:
Sent:Tue, 19 Oct 2021 17:18:45 +0100
Subject:[python] Re: Rear Suspension
Steve
Do the 75mm cranks limit the lean ?
Can you buy decent wheels and tyres in 16" , all the ones I have come
across are definitely at the ' junk ' end of the spectrum [ although I
only get ' free ' stuff :-) ]
I have the old ' Cycle Zoo ' book , how much ' new ' content would
you guess has been added ?
Paul
On 19/10/2021 09:36, cesnur@xxxxxxxxxxxxxx [2] wrote:
Hi Jurgen and all.
My experiences with iLean is very positive, but I made some early
decisions which have made them work for me, they are
Use 75mm unicycle cranks: this minimises wheel scrub during
cornering.
Use custom made shafts to mount wheels, that is bbshaft at
https://www.thingiverse.com/thing:4201871/files [3] ;
Use 349 size 16" wheels, these take up a bit less space, and the
iLean mech provides good suspension despite the small wheel size.
Up till a few weeks ago when I made the rear suspension bike, 90% or
so of my riding was on iLean and that has included a flat 1200k Audax
ride. In general I explain it by saying it's just a way to make the
frame simple and that overall the cycle remains simpler than if you
had a split rear fork. I think every other leaning trike mechanism is
more complex.
Overall I wouldn't have used them as much as I have if they didn't
give good results.
Best wishes
Steve Nurse
Thanks Steve.
What are your experiences with the iLean tilting mechanism?
Regards from Jürgen.
Am 19.10.2021 um 05:00 schrieb cesnur@xxxxxxxxxxxxxx [4]:
Hijust
In the past few weeks I've built a rear suspension trike and have
finished a summary of the build. The suspension depends on having afront
hollow rectangular frame. My build is on a fixed bottom bracket
wheel drive bike, but I think the idea would work just as well onan MBB
like the python. Here is the link,http://modularbikes.blogspot.com/2021/10/rear-suspension-bike-summary.html
[6]============================================================
Regards
Steve Nurse
modularbikes.com.au
