BHPC Forum Homepage
Forum Home Forum Home > Public: Open to anyone > Building
  New Posts New Posts RSS Feed - Alpha 7 Velomobile
  FAQ FAQ  Forum Search   Register Register  Login Login

Starting a new topic? Please try and put it in a relevant forum (Riding, Building, etc) but if you're not sure it's better to post in any forum than not to post at all.


Alpha 7 Velomobile

 Post Reply Post Reply
Author
Message
mark aldridge View Drop Down
Visitor (new)
Visitor (new)


Joined: 29 October 2015
Location: surrey
Status: Offline
Points: 77
Post Options Post Options   Thanks (0) Thanks(0)   Quote mark aldridge Quote  Post ReplyReply Direct Link To This Post Topic: Alpha 7 Velomobile
    Posted: 21 May 2022 at 9:26pm
I am mulling over buying an Alpha 7 Velomobile. The only thing I am concerned about is the rather high gearing and my aging ability to climb Surrey hills.
Does anyone have any experience of fitting current gravel bike chainsets and front changers to replace the road ones.
Failing that how about a Mountaindrive.
Any other suggestions.
Thanks
Mark
Back to Top
Yanto View Drop Down
BHPC Member
BHPC Member
Avatar

Joined: 11 July 2005
Status: Offline
Points: 1394
Post Options Post Options   Thanks (0) Thanks(0)   Quote Yanto Quote  Post ReplyReply Direct Link To This Post Posted: 22 May 2022 at 5:40pm
There is currently no bottom bracket suitable for a MD on the A7. A small 110 PCD chainring can always be fitted.

Back to Top
XAPBob View Drop Down
Visitor (new)
Visitor (new)


Joined: 15 August 2018
Location: Warks
Status: Offline
Points: 39
Post Options Post Options   Thanks (0) Thanks(0)   Quote XAPBob Quote  Post ReplyReply Direct Link To This Post Posted: 22 May 2022 at 7:46pm
How does the BB attach on the alpha?
I had a steel BB shell welded onto a section of cut out box for my mango…
Back to Top
RoyMacdonald View Drop Down
BHPC Member
BHPC Member
Avatar

Joined: 09 March 2007
Location: Rye East Sussex
Status: Offline
Points: 844
Post Options Post Options   Thanks (0) Thanks(0)   Quote RoyMacdonald Quote  Post ReplyReply Direct Link To This Post Posted: 22 May 2022 at 8:18pm
Clamps on to the body with bolts. There are photos on Velomobile World.

John Williams did a YouTube video of my After 7 which is the same system, that shows how it is fixed.

All the best.
Roy < id="BFI_" style="width: 1px; height: 1px; display: none;">
< id="BFI_" style="width: 1px; height: 1px; display: none;">


Edited by RoyMacdonald - 22 May 2022 at 8:21pm
Back to Top
mark aldridge View Drop Down
Visitor (new)
Visitor (new)


Joined: 29 October 2015
Location: surrey
Status: Offline
Points: 77
Post Options Post Options   Thanks (0) Thanks(0)   Quote mark aldridge Quote  Post ReplyReply Direct Link To This Post Posted: 23 May 2022 at 12:56pm
Good afternoon all.
Getting old creates all sorts of problems.
Looks like it is a 33 tooth inner ring on the current crankset.
Will look at whether a gravel bike double will fit or an mtb triple with only two rings.
Looks like the Mountaindrive option is not possible.

Moving on, Velomobileworld offer a 12 speed 11-52 rear sprocket cluster.
I am not keen on 12 speeds.
Do you think an 11 speed 11-52 (or nearest) with the appropriate rear mech would work.

I am not fixated on getting an Alpha 9 and don't want to have to avoid the hills. If I have to look at other makes/models then that is the way to go.

Any thoughts?

Back to Top
RoyMacdonald View Drop Down
BHPC Member
BHPC Member
Avatar

Joined: 09 March 2007
Location: Rye East Sussex
Status: Offline
Points: 844
Post Options Post Options   Thanks (0) Thanks(0)   Quote RoyMacdonald Quote  Post ReplyReply Direct Link To This Post Posted: 23 May 2022 at 1:44pm
Originally posted by mark aldridge mark aldridge wrote:

Good afternoon all.
Getting old creates all sorts of problems.
Looks like it is a 33 tooth inner ring on the current crankset.
Will look at whether a gravel bike double will fit or an mtb triple with only two rings.
Looks like the Mountaindrive option is not possible.

Moving on, Velomobileworld offer a 12 speed 11-52 rear sprocket cluster.
I am not keen on 12 speeds.
Do you think an 11 speed 11-52 (or nearest) with the appropriate rear mech would work.

I am not fixated on getting an Alpha 9 and don't want to have to avoid the hills. If I have to look at other makes/models then that is the way to go.

Any thoughts?

< id="BFI_" style="width: 1px; height: 1px; display: none;">

Hi Mark
Just have to adapt to getting older.
Yes 11 speed will work but I don't see any problem with 12. They can use the same chain and they are made to higher tolerances. My 12 speed changes gear beautifully. The 11-52 cassette is the one I have and I think it's made by Rotor.
What's wrong with the Alpha A/M 9? Great Velomobiles. Why would you need to avoid hills? Never have on my After 7 despite being 78 and only having a single chainring and short cranks.

All the best.
Roy


< id="BFI_" style="width: 1px; height: 1px; display: none;">

Edited by RoyMacdonald - 23 May 2022 at 6:36pm
Back to Top
legs_larry View Drop Down
BHPC Member
BHPC Member
Avatar

Joined: 09 March 2005
Location: London Town Devine
Status: Offline
Points: 1364
Post Options Post Options   Thanks (1) Thanks(1)   Quote legs_larry Quote  Post ReplyReply Direct Link To This Post Posted: 23 May 2022 at 6:14pm
If you gear really low you run the risk of getting wheelspin, to the detriment of forward progress.
====================

a bit ov a lyv wyr by slof standirds
Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 11.02
Copyright ©2001-2015 Web Wiz Ltd.