Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

General Cycling Discussion Have a cycling related question or comment that doesn't fit in one of the other specialty forums? Drop on in and post in here! When possible, please select the forum above that most fits your post!

User Tag List

Reply
 
Thread Tools Search this Thread
Old 10-17-06, 08:20 PM   #1
mooklekloon
Senior Member
Thread Starter
 
Join Date: Sep 2005
Location: Toronto, Ontario
Bikes:
Posts: 124
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Singlespeed front - Multispeed rear

Hi,

This may be a somewhat unusual request.

Ideally, I am looking for a bike that has a single chainring upfront, and multiple gears at the rear. The single chainring upfront would be moderatly sized and there would be 5-10 gears at the rear. The rear derailleur would be able to sweep through all the gears relatively smoothly without too much cross-chaining. Are there any bicycles currently on the market with a drive train like this, or would I have to go custom?

I am also willing to buy a bike with multiple chainrings upfront and remove the front derailleaur and shifter, and do the modification to a single speed crank, but I would rather buy the bike as per my specs. I would also be open to a triple chainring bicycle that could hit all the gears in the back relatively smoothly without cross-chaining when the chain is on the middle ring.

The most important feature is that the bicycle can hit all the gears in the rear, smoothly, without adjusting the front.

Any suggestions?

Thanks!
mooklekloon is offline   Reply With Quote
Old 10-17-06, 10:03 PM   #2
xlntRider79
crushing all limitations
 
Join Date: Sep 2004
Bikes:
Posts: 138
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
not too unusual of a request really...
whether to go custom or not depends on the type of bike you want.
Most "downhill" mountain bikes come this way
Many commuter bikes, crusisers and hybrids come with a single ring up front and externally and/or internally geared rear hubs
Alot of guys swap the outer chainring on their cyclocross bikes for a chainguard and use 9 gears without any shifting problems or extreme chain angles.

If for whatever reason you can't or don't like to shift in the front, you don't really need a special bike with no front shifter. Adjusting the "limit screws" on your front derailleur can effectively "lock out" any movement of the front derailleur, effectively making it a chainguide instead of a shifter. I say find a bike you like, and if it has a double or triple crankset, perform this simple adjustment instead of being limited to the models that come with a single front ring.
xlntRider79 is offline   Reply With Quote
Old 10-17-06, 10:17 PM   #3
Nermal
Senior Member
 
Nermal's Avatar
 
Join Date: Jan 2006
Location: Farmington, NM
Bikes: Giant Cypress SX
Posts: 2,089
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
I had a more widely spaced set of cogs installed on the rear. The small one is slightly smaller that OEM, and the large one is a bit larger. Sorry I don't have the specs, but I ended up with a very nice 9 speed - with granny on the bottom and overdrive on the top. We have hills around here, but mostly I'm in the middle chain ring. I forget the installed price, but it was way under $100.00.

Would an internally geared hub do the trick instead?
__________________
Some people are like a Slinky ... not really good for anything, but you still can't help but smile when you shove them down the stairs.
Nermal is offline   Reply With Quote
Old 10-18-06, 04:57 AM   #4
DieselDan
Senior Member
 
DieselDan's Avatar
 
Join Date: Mar 2003
Location: Beaufort, South Carolina, USA and surrounding islands.
Bikes: Cannondale R500, Motobecane Messenger
Posts: 8,521
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I trained with a guy all summer that ran a 48T front with a 9-speed rear on a cyclocross frame.
DieselDan is offline   Reply With Quote
Old 10-18-06, 05:17 AM   #5
Little Darwin
The Improbable Bulk
 
Little Darwin's Avatar
 
Join Date: Jul 2005
Location: Wilkes-Barre, PA
Bikes: Many
Posts: 8,402
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
I think there are others offered off the shelf, but one that came to mind is the Bianchi Castro Valley.

http://www.bianchiusa.com/607.html
Little Darwin is offline   Reply With Quote
Old 10-18-06, 07:49 AM   #6
slowandsteady
Faster but still slow
 
slowandsteady's Avatar
 
Join Date: Jun 2006
Location: Jersey
Bikes: Trek 830 circa 1993 and a Fuji WSD Finest 1.0 2006
Posts: 5,979
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Okay, so you want a single or a triple, but not a double. What do you have against doubles?
slowandsteady is offline   Reply With Quote
Old 10-18-06, 07:56 AM   #7
operator
cab horn
 
Join Date: Jun 2004
Location: Toronto
Bikes: 1987 Bianchi Campione
Posts: 28,306
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Honest question: why do this?
operator is offline   Reply With Quote
Old 10-18-06, 08:12 AM   #8
merlinextraligh
pan y agua
 
merlinextraligh's Avatar
 
Join Date: Aug 2005
Location: Jacksonville
Bikes: Wilier Zero 7; Merlin Extralight; Co-Motion Robusta; Schwinn Paramount; Motobecane Phantom Cross; Cervelo P2; Motebecane Ti Fly 29er; Calfee Dragonfly Tandem
Posts: 29,159
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 34 Post(s)
guess it really depends on what you're trying to accomplish. If the goal is simplicity on a bike for commuting, or knocking around, and you don't need a wide range, I'd go with with a bike built with a Shimano Nexus internally geared hub. Thus, no crosschaining issue, no derailleurs. Only 1 cog to clean. Can shift stopped. http://www.sheldonbrown.com/internal-gears.html
merlinextraligh is offline   Reply With Quote
Old 10-18-06, 09:00 AM   #9
mooklekloon
Senior Member
Thread Starter
 
Join Date: Sep 2005
Location: Toronto, Ontario
Bikes:
Posts: 124
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Little Darwin
I think there are others offered off the shelf, but one that came to mind is the Bianchi Castro Valley.

http://www.bianchiusa.com/607.html
Hi Everyone,

Thanks for the great suggestions! The reason I want this is, is for simplicity. I would prefer to have the single crank upfront rather than locking out a double or triple, just for weight and aesthetic issues. Does anyone else have any more "off-the-shelf" suggestions. Looking for an all-round/commuter bike rather than something hardcore downhill.

Otherwise, what would be the rough cost to have an LBS do a double/triple to single conversion assuming I want decent components?

Thanks again!
mooklekloon is offline   Reply With Quote
Old 10-18-06, 11:10 AM   #10
slowandsteady
Faster but still slow
 
slowandsteady's Avatar
 
Join Date: Jun 2006
Location: Jersey
Bikes: Trek 830 circa 1993 and a Fuji WSD Finest 1.0 2006
Posts: 5,979
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Thanks for the great suggestions! The reason I want this is, is for simplicity. I would prefer to have the single crank upfront rather than locking out a double or triple, just for weight and aesthetic issues. Does anyone else have any more "off-the-shelf" suggestions. Looking for an all-round/commuter bike rather than something hardcore downhill.
An all around commuter bike will be substantially heavier than a road bike even with one chainring. Here is one example of an off the shelf product with a rear internal 7 speed hub and a single chainring upfront. This bike is close to 40lbs, but would be an excellent utility bike.

http://www.fujibikes.com/2007/bikes.asp?id=367&subcat=3
slowandsteady is offline   Reply With Quote
Old 10-18-06, 12:59 PM   #11
merlinextraligh
pan y agua
 
merlinextraligh's Avatar
 
Join Date: Aug 2005
Location: Jacksonville
Bikes: Wilier Zero 7; Merlin Extralight; Co-Motion Robusta; Schwinn Paramount; Motobecane Phantom Cross; Cervelo P2; Motebecane Ti Fly 29er; Calfee Dragonfly Tandem
Posts: 29,159
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 34 Post(s)
this is what you're looking for. Unfortunately I don't know of anybody that's makes the equivalent off the shelf.

merlinextraligh is offline   Reply With Quote
Old 10-18-06, 01:44 PM   #12
Bolo Grubb
Senior Member
 
Bolo Grubb's Avatar
 
Join Date: Jun 2004
Location: Tucson, AZ
Bikes: 1984 Trek 720 with a Nexus hub, 2016 Cannondale Synapse
Posts: 1,838
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 20 Post(s)
http://www.sheldonbrown.com/harris/bianchi.html
Bolo Grubb is offline   Reply With Quote
Old 10-18-06, 06:11 PM   #13
michael word
Member
 
Join Date: Jul 2006
Bikes:
Posts: 48
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
http://www.raleighusa.com/items.asp?deptid=6&itemid=305
michael word is offline   Reply With Quote
Old 10-18-06, 07:31 PM   #14
slagjumper
Senior Member
 
slagjumper's Avatar
 
Join Date: Apr 2005
Location: Down on East End Avenue.
Bikes: Salsa Las Cruces, Burley R&R and a boat load of others.
Posts: 1,816
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
If you wind up with a double or tripple, I'd leave it alone if it is working. If you want to convert to a single put the chainwheel in the crank position that aligns best with the rear gears.
slagjumper is offline   Reply With Quote
Old 10-18-06, 07:42 PM   #15
Banzai
Jet Jockey
 
Banzai's Avatar
 
Join Date: Jul 2005
Location: St. Paul, MN
Bikes: Cannondale CAAD9, Ritchey Breakaway Cross, Nashbar X-frame bike.
Posts: 4,370
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 54 Post(s)
A standard road triple converts easily, and is very common. Many bike shops will not have "stock" a bike with a single front crank. However, here's how you do it.

1. Have the inner and outer chainrings removed.

2. Replace the outer chainring with a Spot brand aluminum chainguard.

3. On the seat tube mount a Third Eye Chain Watcher, or a Deda Dog Fang.

4. Replace the left brifter with a brake lever.

5. E-bay the brifter you just removed. The chainrings too.

I did this for a friend...it works.
__________________
Good night...and good luck
Banzai is offline   Reply With Quote
Old 10-18-06, 08:11 PM   #16
Nachoman
Senior Member
 
Nachoman's Avatar
 
Join Date: May 2005
Location: Point Loma, CA
Bikes: Bill Holland (Road-Ti), Fuji Roubaix Pro (back-up), Bike Friday (folder), Co-Motion (tandem) & Trek 750 (hybrid)
Posts: 14,162
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 68 Post(s)
Go super pure with a unicycle.
__________________
.
.

Two wheels good. Four wheels bad.
Nachoman is offline   Reply With Quote
Old 10-18-06, 08:39 PM   #17
Dr.Deltron
Guest
 
Bikes:
Posts: n/a
Mentioned: Post(s)
Tagged: Thread(s)
Quoted: Post(s)
My suggestion is a Rohloff rear hub!

14 speeds and NO DERAILEUR!!

just a thought...
  Reply With Quote
Old 10-18-06, 10:47 PM   #18
scottogo
Senior Member
 
Join Date: Dec 2004
Bikes: Electra Townie 7D
Posts: 3,398
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
http://www.ransbikes.com/2Whatsnew07.htm
CITI (new model)
From the site:
"The Citi uses the curved tube styling of the Cruz with the Dynamik frame geometry. The concept of the bike is to provide a simpler bike, only 9 speeds, with fat tires to handle the ill maintained streets, and float over softer surfaces. I use this bike as a chaser after a hard ride. You can push this bike to a fun cruise speed, since it is light and responsive. But you will never feel guilty about taking it easy due the cool styling. The bike is a blast, doing bunny hops, and riding over whatever you dare, seems to be little challenge for the tires or bike. The B-37 bars are called modern day “paper boys” and functions the same, allowing you a more upright position on the longer reach frame geometry. They are wide enough to stand and ride. You gotta love the Big Apples, simple gearing, and looks of this bike and the cool Ti-Rose and Metallic Red colors. • 9-speed for simple gearing
• Cruiser styling
• Fat tires
• B-37 bars, modern day “paper-boys
• Comes in two colors Metallic Red and Ti-rose MSRP $1195"
Attached Images
File Type: jpg 4Citi.jpg (71.3 KB, 1 views)
scottogo is offline   Reply With Quote
Old 10-19-06, 12:56 PM   #19
shider
Senior Member
 
shider's Avatar
 
Join Date: Apr 2006
Location: Cherry Valley, IL
Bikes: Cervelo R3, Trek 2300, Trek Portland, Schwinn Homegrown, Cannondale Road Tandem, Schwinn Le Tour Commuter, Gary Fisher Paragon 29er
Posts: 226
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Are you looking for something like this?
Trek Soho
shider is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 11:16 PM.