Strongest 700c Rim?

Chalo said:

I need a 700c rim to lace up to an electric hub motor. The bike for
which this motor is intended could wind up having a gross vehicle
weight of up to 500 lbs. But hub motors are available only in 36 hole
drilling, so it's important that I use the strongest 36 hole 700c rim I
can get my hands on.

The heaviest and strongest 700c rim I have ever used is the Sun Rhyno,
but this formidable 850g rim has been out of production for several
years. I know that St. Johns Street Cycles in the UK has some in
stock, but I'd prefer to find something in the USA if possible.

The largest and heaviest 700c rim I can still find here is the Sun
Rhyno Lite 700c, 27.5mm wide and about 600g.

So my question is this: Does anybody know of a currently available rim
in 700c and 36 hole drilling that would be stronger than the Sun Rhyno
Lite?

Chalo Colina

if it's the hub i think it is, be careful. it has an amazingly low
right side flange spacing, about 5mm, and i think that, with all due
respect to your size chalo, that could cause some severe problems. not
enough bracing angle = very low lateral stability, especially on a 700c.
just check before proceeding.

Chalo said:

I need a 700c rim to lace up to an electric hub motor. The bike for
which this motor is intended could wind up having a gross vehicle
weight of up to 500 lbs. But hub motors are available only in 36 hole
drilling, so it's important that I use the strongest 36 hole 700c rim I
can get my hands on.

The heaviest and strongest 700c rim I have ever used is the Sun Rhyno,
but this formidable 850g rim has been out of production for several
years. I know that St. Johns Street Cycles in the UK has some in
stock, but I'd prefer to find something in the USA if possible.

The largest and heaviest 700c rim I can still find here is the Sun
Rhyno Lite 700c, 27.5mm wide and about 600g.

So my question is this: Does anybody know of a currently available rim
in 700c and 36 hole drilling that would be stronger than the Sun Rhyno
Lite?

Chalo Colina

What width tire will you be using?
I have Sun Rhyno Lite 36H 700C, but I think Mavic A719 36H 700 is stronger. Sun Ryno Lite is wider and ~ 20 grams heavier. I agree with your thoughts on Sun Ryno (the not lite version).
Mavic only rates the A719 for 125 kg, but I have overloaded it on a touring tandem with almost 500 pounds of riders and gear. They held up fine for a San Diego to Seattle ride.

jim beam said:

Chalo said:

I need a 700c rim to lace up to an electric hub motor. The bike for
which this motor is intended could wind up having a gross vehicle
weight of up to 500 lbs. But hub motors are available only in 36 hole
drilling, so it's important that I use the strongest 36 hole 700c rim I
can get my hands on.

if it's the hub i think it is, be careful. it has an amazingly low
right side flange spacing, about 5mm, and i think that, with all due
respect to your size chalo, that could cause some severe problems. not
enough bracing angle = very low lateral stability, especially on a 700c.
just check before proceeding.

It's true that the flange spacing on most hub motors is narrow, and
their offset can be dramatic if they are spaced to accept 7-speed
freewheels. So even though in principle I prefer the dynamic qualities
of rear wheel drive, I'm going to use a front hub motor in this case.
As far as I can tell, this will allow a completely symmetrical wheel.

The spoke bracing angle will be reduced compared to a conventional
front wheel, but I expect that it will be comparable to a conventional
rear wheel, perhaps even a bit wider.

Chalo Colina

Chalo said:

I need a 700c rim to lace up to an electric hub motor. The bike for
which this motor is intended could wind up having a gross vehicle
weight of up to 500 lbs. But hub motors are available only in 36 hole
drilling, so it's important that I use the strongest 36 hole 700c rim I
can get my hands on.

The heaviest and strongest 700c rim I have ever used is the Sun Rhyno,
but this formidable 850g rim has been out of production for several
years. I know that St. Johns Street Cycles in the UK has some in
stock, but I'd prefer to find something in the USA if possible.

The largest and heaviest 700c rim I can still find here is the Sun
Rhyno Lite 700c, 27.5mm wide and about 600g.

So my question is this: Does anybody know of a currently available rim
in 700c and 36 hole drilling that would be stronger than the Sun Rhyno
Lite?

Chalo Colina

Velocity Dyad or Mavic T-519.

Chalo said:

jim beam said:

Chalo said:

I need a 700c rim to lace up to an electric hub motor. The bike for
which this motor is intended could wind up having a gross vehicle
weight of up to 500 lbs. But hub motors are available only in 36 hole
drilling, so it's important that I use the strongest 36 hole 700c rim I
can get my hands on.

if it's the hub i think it is, be careful. it has an amazingly low
right side flange spacing, about 5mm, and i think that, with all due
respect to your size chalo, that could cause some severe problems. not
enough bracing angle = very low lateral stability, especially on a 700c.
just check before proceeding.

It's true that the flange spacing on most hub motors is narrow, and
their offset can be dramatic if they are spaced to accept 7-speed
freewheels. So even though in principle I prefer the dynamic qualities
of rear wheel drive, I'm going to use a front hub motor in this case.
As far as I can tell, this will allow a completely symmetrical wheel.

The spoke bracing angle will be reduced compared to a conventional
front wheel, but I expect that it will be comparable to a conventional
rear wheel, perhaps even a bit wider.

Chalo Colina

if it's front, you have no worries.

Chalo said:

So my question is this: Does anybody know of a currently available rim
in 700c and 36 hole drilling that would be stronger than the Sun Rhyno
Lite?

Check with Arvon Stacey in Alberta. He builds expedition bicycles and rims.
Hubs too - his use 13 (or is it 12 ) ga spokes for racing sulky wheels 4
cartridge bearings instead of just 2. Almost indestructible.. E-mail is:

[email hidden]

His rims are made of extrusions that are custom made for him. Frames and
forks (etc) hand made, etc....

Ken

Winnipeg, Canada

Ken Pisichko said:

Check with Arvon Stacey in Alberta. He builds expedition bicycles and rims.
Hubs too - his use 13 (or is it 12 ) ga spokes for racing sulky wheels 4
cartridge bearings instead of just 2. Almost indestructible.. E-mail is:

[email hidden]

His rims are made of extrusions that are custom made for him. Frames and
forks (etc) hand made, etc....

Thanks for the tip. I have talked with Arvon about getting one of his
proportional tall frames, but I was unaware that he made special
wheels.

Chalo Colina

daveornee said:

Chalo said:

I need a 700c rim to lace up to an electric hub motor. The bike for
which this motor is intended could wind up having a gross vehicle
weight of up to 500 lbs. But hub motors are available only in 36 hole
drilling, so it's important that I use the strongest 36 hole 700c rim
I can get my hands on.

What width tire will you be using?

Under the circumstances, I am not considering anything less than an
actual 35mm or so. I reckon I'll use Schwalbe Marathon Plus 700x38
tires; so far I am very impressed with their ruggedness and ride
qualities.

Quoted message said:

I have Sun Rhyno Lite 36H 700C, but I think Mavic A719 36H 700 is
stronger. Sun Ryno Lite is wider and ~ 20 grams heavier.

Interesting. I use similar T519 rims in 48 hole drilling on one of my
bikes, and I'm happy with them. But since they are narrower, not
significantly taller, and no heavier than Rhyno Lites, I didn't think
they'd be any stronger.

Quoted message said:

Mavic only rates the A719 for 125 kg, but I have overloaded it on a
touring tandem with almost 500 pounds of riders and gear. They held up
fine for a San Diego to Seattle ride.

The open road seems comparatively merciful to wheels in my experience.
My usual workday commute is cratered and rutted by railroad tracks and
truck traffic, and constitutes a very difficult environment for wheels.
I recently pinch flatted a 38mm tire that was pumped up to 100psi--
while riding in an alleged bike lane!

Chalo Colina

Qui si parla Campagnolo said:

Chalo said:

So my question is this: Does anybody know of a currently available rim
in 700c and 36 hole drilling that would be stronger than the Sun Rhyno
Lite?

Chalo Colina

Velocity Dyad or Mavic T-519.

I thought the Dyad was pretty lightweight and not particularly wide or
tall? I don't see what about it puts it in the category of heavy-duty
rims.

The Mavic T519 does seem roughly equal in strength to the Rhyno Lite,
though.

I wish Velocity would use the big extrusion from their MTB and BMX
deep-V rims to make a 700c rim. Now that would build a mighty wheel.

Chalo Colina

In article <[email hidden]>,
[email hidden] says...

Quoted message said:

I thought the Dyad was pretty lightweight and not particularly wide or
tall? I don't see what about it puts it in the category of heavy-duty
rims.

480gm and 24mm wide from their website. I understand you are a little
heavier and wider than that.

Chalo said:

I need a 700c rim to lace up to an electric hub motor. The bike for
which this motor is intended could wind up having a gross vehicle
weight of up to 500 lbs. But hub motors are available only in 36 hole
drilling, so it's important that I use the strongest 36 hole 700c rim I
can get my hands on.

The heaviest and strongest 700c rim I have ever used is the Sun Rhyno,
but this formidable 850g rim has been out of production for several
years. I know that St. Johns Street Cycles in the UK has some in
stock, but I'd prefer to find something in the USA if possible.

The largest and heaviest 700c rim I can still find here is the Sun
Rhyno Lite 700c, 27.5mm wide and about 600g.

So my question is this: Does anybody know of a currently available rim
in 700c and 36 hole drilling that would be stronger than the Sun Rhyno
Lite?

Chalo Colina

Is it possible to drill more holes in the flanges and make it a 72 hole?
I'm 230 lbs., and find rim strength a problem with a 36 spoke 26" rear on a 56 lb 400w ebike.

How many watts is you hub motor?
Is this front or rear or TBD?

meb said:

Chalo said:

I need a 700c rim to lace up to an electric hub motor. The bike for
which this motor is intended could wind up having a gross vehicle
weight of up to 500 lbs.

Not 700c, but these rims are worth a look. When it comes to stout
bicycle rims, can anything beat these?

http://www.icebike.org/Equipment/rims.htm

Wayne

Chalo said:

I need a 700c rim to lace up to an electric hub motor. The bike for
which this motor is intended could wind up having a gross vehicle
weight of up to 500 lbs. But hub motors are available only in 36 hole
drilling, so it's important that I use the strongest 36 hole 700c rim I
can get my hands on.

The heaviest and strongest 700c rim I have ever used is the Sun Rhyno,
but this formidable 850g rim has been out of production for several
years. I know that St. Johns Street Cycles in the UK has some in
stock, but I'd prefer to find something in the USA if possible.

The largest and heaviest 700c rim I can still find here is the Sun
Rhyno Lite 700c, 27.5mm wide and about 600g.

So my question is this: Does anybody know of a currently available rim
in 700c and 36 hole drilling that would be stronger than the Sun Rhyno
Lite?

The Rhyno Lite isn't a great rim. I used to have the 26" version and it
doesn't have sockets, nor is it especially strong (it *is* heavy
though!). I would look for something with a deeper section for carrying
heavy loads.

Is there any reason you can't use a 26" rim, which is inherently stronger?

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In article <[email hidden]>,

Chalo said:

I need a 700c rim to lace up to an electric hub motor. The bike for
which this motor is intended could wind up having a gross vehicle
weight of up to 500 lbs. But hub motors are available only in 36 hole
drilling, so it's important that I use the strongest 36 hole 700c rim I
can get my hands on.

The heaviest and strongest 700c rim I have ever used is the Sun Rhyno,
but this formidable 850g rim has been out of production for several
years.

_ I'll sell you mine if you want, it's been built up into a single
speed wheel that I've been riding for a year or so. I ride that
bike once a week at most. I was planning to disasemble the wheel
at some point this summer anyway.

_ Booker C. Bense

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Chalo said:

daveornee said:

Chalo said:

I need a 700c rim to lace up to an electric hub motor. The bike for
which this motor is intended could wind up having a gross vehicle
weight of up to 500 lbs. But hub motors are available only in 36 hole
drilling, so it's important that I use the strongest 36 hole 700c rim
I can get my hands on.

What width tire will you be using?

I think you should take a look at http://www.santanabikes.com/ and use
all tandem componentry. Take the toughest off-road santana tandem and
adopt all the parts used on that bike. That is a good starting point
for making an ultra-tough and ultra-heavy bicycle of some sort. You
know, 48-spoke wheels and Suzue Pro-max front hub or something. You
might also email santana about what you are planning to do - they
probably know a thing or two about bikes that carry 500 pound loads ..

- Don Gillies
San Diego, CA

meb said:

Chalo said:

I need a 700c rim to lace up to an electric hub motor. The bike for
which this motor is intended could wind up having a gross vehicle
weight of up to 500 lbs. But hub motors are available only in 36 hole
drilling, so it's important that I use the strongest 36 hole 700c rim
I can get my hands on.

Is it possible to drill more holes in the flanges and make it a 72
hole?

Well, that's possible-- and I have even done it before with disk brake
hubs and gearhubs. I still have specially made 72 hole Velocity Deep-V
rims if I want to use those. However, not only is that a lot of
painstaking work (54 holes must be precisely located and drilled), but
I don't think it would result in a significantly stronger wheel than a
substantially heavier rim laced with 36 spokes.

On the plus side, the Deep-V with 72 spokes would be lighter and
cooler-looking. On the minus side, it would not fit very well with the
wide tires I intend to use.

Quoted message said:

I'm 230 lbs., and find rim strength a problem with a 36 spoke 26" rear
on a 56 lb 400w ebike.

How many watts is you hub motor?
Is this front or rear or TBD?

My current electric bike, using a nominal 400W scooter motor and
weighing about 70 lbs., uses a 36 hole BMX hub with a Sun Rhyno Lite
700c rim on the rear. The wheel requires more frequent truing than my
pedal bikes' wheels (like every 100 miles or so), but seems reasonably
well-suited to the task.

The hub motor I would like to use is a 750W unit in a front wheel. The
hubmotor alone weighs about 12 lbs. The bike will be capable of higher
speeds than the one I currently use, and may be heavier due to a larger
battery pack. On the other hand, only the front wheel will have 36
spokes-- the rear will have 48.

Chalo Colina

Wayne Pein said:

Not 700c, but these rims are worth a look. When it comes to stout
bicycle rims, can anything beat these?

http://www.icebike.org/Equipment/rims.htm

I've got those on my custom Chalo-sized MTB. They are sturdy rims
considering that they are single-walled. Mine are special 48-hole
models.

I believe Snow Cat rims are out of production now. The last production
batch included some 29"/700c rims IIRC.

Snow Cat rims dwindle in comparison with the stupendous Surly Large
Marge:

http://www.surlybikes.com/parts/largemarge_pop.html

Chalo Colina

In article <[email hidden]>,

Chalo said:

Wayne Pein said:

Not 700c, but these rims are worth a look. When it comes to stout
bicycle rims, can anything beat these?

http://www.icebike.org/Equipment/rims.htm

I've got those on my custom Chalo-sized MTB. They are sturdy rims
considering that they are single-walled. Mine are special 48-hole
models.

I believe Snow Cat rims are out of production now. The last production
batch included some 29"/700c rims IIRC.

Snow Cat rims dwindle in comparison with the stupendous Surly Large
Marge:

http://www.surlybikes.com/parts/largemarge_pop.html

Chalo Colina

Mm yes. They designed a special bike to fit the oversized rims that they
invented to take the Chalo-sized 3.7" tires they're having made.

http://www.surlybikes.com/2005_04_01_surlyblogarchive.html

The tires are called Endomorphs. The offset-frame bike is called the
Pugsley.

http://www.surlybikes.com/pugsley.html

In case you're wondering, they claim it's for soft and sloppy surfaces.
I like it.

--
Ryan Cousineau [email hidden] http://www.wiredcola.com/
"I don't want kids who are thinking about going into mathematics
to think that they have to take drugs to succeed." -Paul Erdos

Chalo said:

Quoted message said:

So my question is this: Does anybody know of a currently available rim

in 700c and 36 hole drilling that would be stronger than the Sun Rhyno
Lite?

Chalo Colina

Look here:
http://www.unicycle.com/shopping/shopdisplayproducts.asp?id=2&subcat=24&cat=Touring&L2=Rims&L3=Touring

The Kris Holm unicycle rims are supposed to be pretty bad-ass & have
gained some popularity in the 29er MTB movement. 30.8 bead seat to bead
seat, 38 wide, 20mm deep.