Retrobike Forum Index

It is currently Wed Dec 07, 2016 9:21 pm

* Login   * Register * Search  * FAQ



Post new topic Reply to topic  [ 22 posts ]  Go to page 1, 2, 3  Next
Author Message
 Post subject: What is the top speed
PostPosted: Mon Jun 11, 2007 8:05 pm 
King of the DuckBoard
King of the DuckBoard

Joined: Sun Jan 28, 2007 12:30 pm
Posts: 21466
If i was the fittest man in the world :wink: What would be the highest speed i could travel on the gears on my XT-R 44/11 teeth? No not down hill but on the road in a nice day. So a bit dreaming i know :lol: But also the theory


Top
 Profile  
 
 Post subject:
PostPosted: Mon Jun 11, 2007 8:08 pm 
Old School Grand Master
User avatar

Joined: Sat May 20, 2006 2:56 pm
Posts: 4776
Location: No brakes? Way to commit soldier.
Depends how fast you can spin your legs and what size your tyres are :)


Top
 Profile  
 
 Post subject:
PostPosted: Mon Jun 11, 2007 8:09 pm 
BoTY Winner
BoTY Winner
User avatar

Joined: Tue Apr 04, 2006 6:39 pm
Posts: 2568
Location: Durango CO, USA
Not sure what you'd be able to do with your 44, but on my TT bike, full aero setup with disc, downhill in a tailwind spinning out a 53/11, I've never gone faster than 60mph


Top
 Profile  
 
 Post subject:
PostPosted: Mon Jun 11, 2007 8:19 pm 
retrobike rider
retrobike rider
User avatar

Joined: Wed Jan 04, 2006 10:12 pm
Posts: 2993
Location: Northumberland
According to my Cateye i hit 48mph using a 42/11 set up. It was downhill on tarmac, but i still had to pedal, i think it worked out at 180rpm :shock: Not something you can maintain for long :lol:


Top
 Profile  
 
 Post subject:
PostPosted: Mon Jun 11, 2007 9:17 pm 
MacRetro rider
MacRetro rider
User avatar

Joined: Fri Mar 09, 2007 2:11 pm
Posts: 8700
Location: DUNDEE
Back at my peak - looonnnngggg time ago - 50 / 12 set up got me 48 off road and 52 on road downhill

- at 52 I couldn't keep the pressure on the cranks for more than a few revolutuions at a time.

- At 48 offroad I stopped peddaling because I was scared.


Top
 Profile  
 
 Post subject:
PostPosted: Mon Jun 11, 2007 10:36 pm 
Old School Grand Master
User avatar

Joined: Sat May 20, 2006 2:56 pm
Posts: 4776
Location: No brakes? Way to commit soldier.
I've just done some maths and reckon that you would need to maintain a cadence of 151rpm to get 48mph out of your bike with a 44/11 combo and 26" wheels. Reduce that speed according to your cadence.


Top
 Profile  
 
 Post subject:
PostPosted: Mon Jun 11, 2007 10:38 pm 
King of the DuckBoard
King of the DuckBoard

Joined: Sun Jan 28, 2007 12:30 pm
Posts: 21466
48 :shock: I could never do that in London. The traffic is a nightmare :lol: The boys in blue did stop me once for going to fast in a built up area :shock: Lucky i had better brakes back then.


Top
 Profile  
 
 Post subject:
PostPosted: Mon Jun 11, 2007 10:58 pm 
The Guv'nor
The Guv'nor
User avatar

Joined: Sun Jul 03, 2005 11:19 pm
Posts: 23176
Location: Retrobike HQ
ameybrook wrote:
Not sure what you'd be able to do with your 44, but on my TT bike, full aero setup with disc, downhill in a tailwind spinning out a 53/11, I've never gone faster than 60mph


That's insane. What bars were you using? Aero ones? I've managed over 50mph on the drops on my road iron and to be honest it scared my sh*tless.


Top
 Profile  
 
 Post subject:
PostPosted: Mon Jun 11, 2007 11:06 pm 
BoTY Winner
BoTY Winner
User avatar

Joined: Tue Apr 04, 2006 6:39 pm
Posts: 2568
Location: Durango CO, USA
John wrote:

That's insane. What bars were you using? Aero ones? I've managed over 50mph on the drops on my road iron and to be honest it scared my sh*tless.


Yeah, my TT bike with Cinelli integrated bar/stem combo. Trust when I went that fast, it was coming down a solid 6% grade in a tailwind. Yeah, it was too fast to be going without having my fingers on some sort of brake lever. I wouldn't be able to pedal myself up that fast for sure.

:wink:


Top
 Profile  
 
 Post subject:
PostPosted: Mon Jun 11, 2007 11:11 pm 
Dirt Disciple
User avatar

Joined: Thu Mar 15, 2007 4:37 pm
Posts: 98
Location: The Parish of St Evenage
In the Polaris Challenge in the Keilder Forest in 1992, I recorded 50mph on my speedo off road. It was a very steep and quite twisty fire road off of Hindhope Law (425 metres) that was really icy. I was scared to use the brakes and pedalling seemed to give me more grip than trying to just coast.

When I managed to stop at the bottom, I checked the max speed and thought it must be wrong until the next guy down came screeching to a halt and checking his speedo yelled "Wow! 48 mph", so I guess it was true. It was on my Cannondale (in those days fully rigid) with a 48/12 top gear.

Ironically the fastest I have knowingly been on tarmac was only 48 mph, again on the Polaris, this time in 2004 in the Northern Pennines. It was on the descent off Killhope Summit (627 metres) on the A689 heading east towards the village of Nenthead. This time I was deliberately going for a record and only failed beating my previous best because my chosen route meant I had to turn off on a side road half way down. The road runs straight down the hill so If I had let it run all the way into Nenthead (at the bottom) I'm sure I could have got nearer to sixty. This was on my Scott and was on a 48/11 (retro chain rings (48/38/28 ) but a modern 8 speed cassette).


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 22 posts ]  Go to page 1, 2, 3  Next

All times are UTC [ DST ]


Who is online

Users browsing this forum: konatime, uktyler and 36 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  

About Us

Follow Retrobike

Other cool stuff

All content © 2005-2015 Retrobike unless otherwise stated.
Cookies Policy.
bikedeals - the best bike deals in one place
FatCOGS - Fat Chance Owner's Group

Powered by phpBB® Forum Software © phpBB Group