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what's with all the tiny front sprockets these days??

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trevor saxe-coburg-gotha
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PostPosted: 13:34 - 09 Jun 2013    Post subject: what's with all the tiny front sprockets these days?? Reply with quote
Okay - one of the kids wants a mongoose like her big sister's. Fair dos. But now that I look at these bmx bikes and similar, how come they've all got such diddy front sprockets?? They were never like that in my day. Just normal sized. What gives??
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trevor saxe-coburg-gotha
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PostPosted: 17:42 - 09 Jun 2013    Post subject: Reply with quote
Whoah. Makes sense. Thumbs Up
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Wafer_Thin_Ham
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PostPosted: 17:44 - 09 Jun 2013    Post subject: Reply with quote
Partly, and partly who needs big gearing in skate/bmx parks.
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stinkwheel
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Joined: 12 Jul 2004
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PostPosted: 19:14 - 09 Jun 2013    Post subject: Reply with quote
All the cool kids have tiny front sprockets these days. Not just BMX-ers.

Get with the times man.

[https://i48.photobucket.com/albums/f216/stinkwheel/CIMG0984_zps08721baa.jpg
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Omega
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Joined: 07 May 2009
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PostPosted: 20:50 - 09 Jun 2013    Post subject: Reply with quote
stinkwheel wrote:
All the cool kids have tiny front sprockets these days. Not just BMX-ers.


What is that on the chain near the back wheel that looks like a derailleur? I'm guessing it's a single speed bike. Kinda looks like it's there to keep the chain tense but couldn't it just have a shorter chain?
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trevor saxe-coburg-gotha
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Joined: 22 Nov 2012
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PostPosted: 21:28 - 09 Jun 2013    Post subject: Reply with quote
stinkwheel wrote:
All the cool kids have tiny front sprockets these days. Not just BMX-ers.

Get with the times man.

[https://i48.photobucket.com/albums/f216/stinkwheel/CIMG0984_zps08721baa.jpg


Good grief. That can't be right, can it??
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Omega
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PostPosted: 00:36 - 10 Jun 2013    Post subject: Reply with quote
Ollie1995 wrote:
Many single speed bikes have chain tensioners as sometimes removing as few as 1 link are either too tight or too slack


Cool. Thanks mate. Thumbs Up
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stinkwheel
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Joined: 12 Jul 2004
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PostPosted: 15:11 - 10 Jun 2013    Post subject: Reply with quote
Ollie1995 wrote:

Many single speed bikes have chain tensioners as sometimes removing as few as 1 link are either too tight or too slack


This ^^^

It's called a singleator and it's used to keep the chain tension because that bike wasn't designed to be a single speed. It has vertical dropouts so there is no way to move the back wheel back and forth to tension the chain. I finally managed to squeeze in another half-link on the chain so it's less necessary now.
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Hetzer
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PostPosted: 15:14 - 10 Jun 2013    Post subject: Reply with quote
stinkwheel wrote:
All the cool kids have tiny front sprockets these days. Not just BMX-ers.

Get with the times man.

[https://i48.photobucket.com/albums/f216/stinkwheel/CIMG0984_zps08721baa.jpg


Is that for cycling up the sides of buildings? Man, I would love to see you pedalling that down the road. Do your knees exceed C? Laughing
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stinkwheel
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PostPosted: 15:45 - 10 Jun 2013    Post subject: Reply with quote
Hetzer wrote:

Is that for cycling up the sides of buildings? Man, I would love to see you pedalling that down the road. Do your knees exceed C? Laughing


I worked out that when mountain biking, you are either slogging up a hill or rolling down one.

With 1.75 x 29" wheels pumped up reasonably hard, I often roll past people on standard mountain bikes who are having to pedal.

It goes over boulders pretty well too. I'm learning to tackle slabs, ground clarance is not an issue.
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I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.
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thelamoth
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Joined: 17 Jun 2005
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PostPosted: 22:52 - 10 Jun 2013    Post subject: Reply with quote
I had a short blast on a mates On One Inbred 29er due to playing musical bikes at Coed Y Brenin...thought my 456 was good..
When those 29 inch wheels get up to speed its a hoot Very Happy
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stinkwheel
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PostPosted: 00:27 - 11 Jun 2013    Post subject: Reply with quote
thelamoth wrote:
I had a short blast on a mates On One Inbred 29er due to playing musical bikes at Coed Y Brenin...thought my 456 was good..
When those 29 inch wheels get up to speed its a hoot Very Happy


I did the Minor-Tor run at Coed-y-Brennin on my single speed, 1973 Puch road bike with this exact setup and gearing. I also overtook a few people on it. Only has 27" wheels though.
https://i48.photobucket.com/albums/f216/stinkwheel/1CIMG0589.jpg
It's what inspired me to make the bike I have now. Essentially a supersize BMX.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.
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