No shifting on new bike
Hi,
I'm a complete newbie when it comes to cycling so I might be missing something very basic in the issue I'm describing below.
I got a brand new Bergamont Sweep 4.0 with Shimano Sora gear system a couple of weeks ago, and gears were shifting fine at the store. But I've now noticed that gears aren't changing either in the front chainring (chain sitting on inner ring) or in the rear cogs (chain sitting on outer cog).
While moving the shifters (and rotating pedals using hand, as I don't have enough space on the balcony to actually ride the bike while shifting) the cables show no effect (not sure if they should) of changing tension etc. Also, the front derailleur is completely stiff and doesn't move either vertically or horizontally - also not sure if this is how it should be.
I understand continuous shifting should switch the chain first to one direction and, upon reaching the outer rear cog/front ring, continue switching to the other direction. Am I right in understanding this?
Any ideas would be greatly appreciated. Again, I suspect I'm just missing something very basic here.
P.S. I haven't yet actually managed to ride the bike - it's been standing on my balcony so far while I've been buying components etc. I would obviously take the bike back to the store and see what the issue is but I'm curious to understand the mechanics and reasons for such issues to prevent/solve them myself.
I'm a complete newbie when it comes to cycling so I might be missing something very basic in the issue I'm describing below.
I got a brand new Bergamont Sweep 4.0 with Shimano Sora gear system a couple of weeks ago, and gears were shifting fine at the store. But I've now noticed that gears aren't changing either in the front chainring (chain sitting on inner ring) or in the rear cogs (chain sitting on outer cog).
While moving the shifters (and rotating pedals using hand, as I don't have enough space on the balcony to actually ride the bike while shifting) the cables show no effect (not sure if they should) of changing tension etc. Also, the front derailleur is completely stiff and doesn't move either vertically or horizontally - also not sure if this is how it should be.
I understand continuous shifting should switch the chain first to one direction and, upon reaching the outer rear cog/front ring, continue switching to the other direction. Am I right in understanding this?
Any ideas would be greatly appreciated. Again, I suspect I'm just missing something very basic here.
P.S. I haven't yet actually managed to ride the bike - it's been standing on my balcony so far while I've been buying components etc. I would obviously take the bike back to the store and see what the issue is but I'm curious to understand the mechanics and reasons for such issues to prevent/solve them myself.
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Comments
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have you left it outside in all weather?0
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Tornike wrote:I understand continuous shifting should switch the chain first to one direction and, upon reaching the outer rear cog/front ring, continue switching to the other direction. Am I right in understanding this?
In short, no. Each lever on the handlebars does three things:
1) operates a brake (you pull the whole lever towards you)
2) changes gear one way (you move the whole lever towards the middle of the handlebars until it clicks)
3) changes gear the other way (you move just the smaller lever towards the middle of the handlebars until it clicks)
The front derailleur might be jammed somehow, but they do take a surprising amount of effort to move them by hand. It won't move up and down at all, only in and out.
Can you move the smaller lever on its own (i.e. just press the small plastic tab) without moving the whole metal lever?0 -
As I expected, it was just my inexperience in understanding gear movement. I somehow missed this part of gear change and thought only the smaller shifter was responsible for both shifting directions.[url=http://www.bikeradar.com/forums/viewtopic.php?p=19708685#p19708685]ElectronShepherd[/url] wrote:
2) changes gear one way (you move the whole lever towards the middle of the handlebars until it clicks)Tornike wrote:I understand continuous shifting should switch the chain first to one direction and, upon reaching the outer rear cog/front ring, continue switching to the other direction. Am I right in understanding this?
Thanks for clearing it up.0 -
You aren't completely incorrect. SRAM systems work like that. They call it Double Tap. You click it a little to go one direction or farther to go the other direction.0
