Recumbent - Bigass chainring?

I'm building up a recumbent and I'm trying to avoid using a jackshaft. Does anyone make a chainring in the 70 tooth range?

You lost me at "recumbent".

Come on wanders, he's trying to build up the fastest Mup rig so he can drop all of those silly roadies on their conventional bicycles.

OK then. It looks like you're going to have to fabricate it youself like this guy (http://www.fleettrikes.com/tth8.htm).





For what it's worth, "I just jackshafted a roadie" will get you more recumbent cool points.

LOL. Those teeth look like they'd wreak some havoc on a chain. But maybe the diameter mitigates that.

GO BACK (http://www.bikeforums.net/forumdisplay.php?f=37) to where you belong!!! We don't need your kind here, and that chainring looks like it won't be very effective with the shape of the "teeth"

Pfft .... I use a 80 tooth ring for easy spinning during the winter.

GO BACK (http://www.bikeforums.net/forumdisplay.php?f=37) to where you belong!!! ...

I think you mean-

"And Chipcom answered and said unto him, Get thee behind me, Satan: for it is written, Thou shalt worship the diamond frame, and it only shalt thou ride."

Bent's are so much faster than wedgies, you'll all learn once you get droped on the Mup by one of them. 'Bent's can turn a fat, bearded granola-eating college professor into a pro bike racer.

Bent's are so much faster than wedgies, you'll all learn once you get droped on the Mup by one of them. 'Bent's can turn a fat, bearded granola-eating college professor into a pro bike racer.

That's why I stay off of the MUP's and on the road, where the climbs are.

Bent's are so much faster than wedgies, you'll all learn once you get droped on the Mup by one of them. 'Bent's can turn a fat, bearded granola-eating college professor into a pro bike racer.

They were all clogging up the Metro Parks Sat.
Bents with jingle bells,dog pulling a trike,professors,etc.
Was there a convention here or is the circus in town?

Or, just use a 2 tooth rear cog.

Ahhh...the recumbulator hate is stong with this thread....I feel I belong here now....

I always enjoy a visit from our recumbulator friends so I will lend a hand to Foster from Florida.
BIG chain ring for you:
Find an old Western Auto outboard.
Remove the flywheel from top of motor.
Voila,a 100+ tooth ring.
You are now the fastest mechanical beach chair in God,s Waiting Room.

Why do you people dislike recumbents?

They were all clogging up the Metro Parks Sat.
Bents with jingle bells,dog pulling a trike,professors,etc.
Was there a convention here or is the circus in town?
I've yet to see a Bent in the parks, maybe you should stay off of the Mup?:lol:

And we hate bents because they're the Rush Limbaugh of cycling, without the oxycontin addiction.

Why do you people dislike recumbents?

Don't worry, it's just talking sh*. ;)

And 'bents are easy targets 'cuz they're so low. :D

Don't worry, it's just talking sh*. ;)



Speak for yourself. They stank...... And I HATE 'em!

Why do you people dislike recumbents?

I find your lack of faith disturbing....

I'm building up a recumbent and I'm trying to avoid using a jackshaft. Does anyone make a chainring in the 70 tooth range?

I think the MDT rings are made by Highpath?

http://www.mdt-products.com/products/138_luna_aero/luna_aero.htm

http://www.highpath.net/cycles/eggs/01.html

Why do you people dislike recumbents?

Why do you say that?

what part of "road cycling forum" made you think that anyweenie here knows what a jackoffshaft is?

Greenspeed do big chainrings.

Greenspeed do big chainrings.

looks like they have TA Specialites up to 61, dude is looking for 70

Paragon Machine works used to make some 60t chainrings. Maybe they could fabricate a 70t one for you.

I've yet to see a Bent in the parks, maybe you should stay off of the Mup?:lol:

And we hate bents because they're the Rush Limbaugh of cycling, without the oxycontin addiction.

Why do you hate people addicted to Oxycontin?

Recumbent or not, the options are similar.

* Find a big ring: Not optimal because a front derailleur won't match the diameter of a 70T ring (although it'll work.)

* Schlumpf Speed Drive: direct and 1.65 overdrive built into the bottom bracket. It only allows a only a single chainring, so you'd have two effective chainrings, i.e. 44T/74T.

* SRAM 3x9: 0.73 underdrive, direct drive, and 1.37 overdrive. It can be used with a triple chainring, providing 81 gears. Needs to be built into a wheel.

You want huge gear ratios?

Check out this page: http://www.canosoarus.com/08LSRbicycle/LSR%20Bike02.htm

The bike at the top has a chainring whose diameter is larger than that of the cranks. The bike at the bottom has a double-reduction chainring system. Take your pick :)

I'm building up a recumbent and I'm trying to avoid using a jackshaft. Does anyone make a chainring in the 70 tooth range?

Greenspeed does, and Hostel Shoppe sells 'em.
http://hostelshoppe.com/cgi-bin/readitem.pl?Accessory=1155076891

If you like, I can try to find an old HPV News article on machining your own at home.


Nice avatar, BTW: Ack! Thpt!

Flying furniture could probaly help out, or Greenspeed.
Another option is to go with a Capreo rear hub = 9 tooth small sprocket :)

"And Chipcom answered and said unto him, Get thee behind me, Satan: for it is written, Thou shalt worship the diamond frame, and it only shalt thou ride."


Ah yes, and you must be the receiver in the relationship.
I prefer my men to be able to get it up and GO!

looks like they have TA Specialites up to 61, dude is looking for 70

Greenspeed do their own chainrings, besides supplying TA. Scroll down a little on http://www.greenspeed.com.au/gsparts.html and you'll find 73T and 80T chainrings.