For the Speed, you could go for a 62T chainring at Hostel Shoppe for
about $50-. It will add quite a bit to the top end.
For the 700... 24T chainring and a 11-34 PG-970 SRAM cassette [you
can mix and match your PG950 cogs if you want].

Learn to use the late Sheldon Brown's gear calculator to get some
bearing on what gear changes mean on a particular drivetrain:
http://www.sheldonbrown.com/gears/

If you want to learn more about gearing a trike, see my blog at:
http://phattkatt.blogspot.com
I have two useful entries related to safeguards and general
information on gearing.

Enjoy

--- In TeamCatrike@yahoogroups.com, "James Graham" <cattryker@...>
wrote:
>
> I had an 05 Speed and went to the 700. On the Speed I was running
55/42/30
> Rotor Cranks. I changed the Rotors over to the 700 and I had to
change them
> to 53/39/26 to get close to the ratio I was running on the Speed.
Not
> exactly the same but real close.
>
> James
>
> Catrike 700 #41
>
>
>
>
>
> From: TeamCatrike@yahoogroups.com
[mailto:TeamCatrike@yahoogroups.com] On
> Behalf Of kkluckhohn
> Sent: Saturday, July 12, 2008 12:07 PM
> To: TeamCatrike@yahoogroups.com
> Subject: [TeamCatrike] Catrike 700 Gearing
>
>
>
> I have a 2007 Catrike 700 and my uncle has a 2006 Catrike Speed. We
> went for a ride last week, and noticed going up a hill, that I was
> working much harder up the hill than he was with his speed, and I
was
> in 1st gear all the way around, while he wasn't. . . However, going
> down hills, I didn't max out and had several more gears that I could
> utilize, while he was maxing out. We are looking for gearing
> somewhere in the middle, so that I am able to 'spin' a bit more up
the
> hills, and he can really crank into the peddles down the hills.
>
> Has anyone changed their gearing, and if so what would you
recommend?
>
> --Kevin
>