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Search: Posts Made By: IanS
Showing results 1 to 50 of 55
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Forum: Tandem Cycling
05-20-19, 02:44 PM
Replies: 1
Views: 944
Posted By IanS

Looking for pilots in Lyon / Aix en Provance France

I'm visually impaired and am going to be in Lyon next week and Aix the following week on a family holiday.

I was just wondering whether their might be any tandem pilots in the region who might be...
Forum: Tandem Cycling
08-18-18, 02:29 PM
Replies: 9
Views: 1,332
Posted By IanS

I've often had the same thought as some of the roads we ride on are terrible. As an e

I've often had the same thought as some of the roads we ride on are terrible. As an example, there's a two mile stretch when our speed drops 3 kph when we hit it. Apart from being incredibly...
Forum: Tandem Cycling
05-23-17, 03:42 AM
Replies: 24
Views: 4,817
Posted By IanS

Re contact area and pressure, I think this is the...

Re contact area and pressure, I think this is the point, although clearly pressure is related to the volume of air contained in the tube. For a wider tyre, if the contact area remains the same, you...
Forum: Tandem Cycling
05-18-17, 01:47 AM
Replies: 24
Views: 4,817
Posted By IanS

Tyre pressure and speed

I was directed to this article on tyre pressure and speed which basically says that in terms of rolling resistance, lower pressures are faster in all but very exceptional conditions (perfectly smooth...
Forum: Tandem Cycling
08-01-12, 02:23 AM
Replies: 47
Views: 11,935
Posted By IanS

A very similar thing happen to us a couple of...

A very similar thing happen to us a couple of weeks ago as well but possibly for different reasons. The end result was that the rear derailure flipped backround on itself and became wedged in between...
Forum: Tandem Cycling
01-25-12, 04:11 AM
Replies: 6
Views: 978
Posted By IanS

We're using the Avid BB7s on a stock C'dale road...

We're using the Avid BB7s on a stock C'dale road tandem and from what my pilot's tell me, they work very well. However, we spend a lot of time faffing with them trying to get them set up correctly...
Forum: Tandem Cycling
09-06-11, 05:04 AM
Replies: 11
Views: 4,800
Posted By IanS

As far as the ratchets is concerned, it had done...

As far as the ratchets is concerned, it had done around 3,000 miles of hard riding and so was pretty well warn and had a good innings - much as htough I'd like to think it was just down to our power!...
Forum: Tandem Cycling
09-05-11, 04:06 AM
Replies: 11
Views: 4,800
Posted By IanS

Since you only hear the noise while coasting and...

Since you only hear the noise while coasting and the suggestions made by others seem to have resolved your issue, this isn't likely to be relevant to you, but felt it may be helpful to others who...
Forum: Tandem Cycling
08-25-11, 01:28 PM
Replies: 11
Views: 2,112
Posted By IanS

There are 2 springs, in the hub, either side of...

There are 2 springs, in the hub, either side of the 2 star rachets. So from your comment, this is a newer Bontrager wheel? It's about 3 years old if that helps?

Do the TD Swiss maintenancekit...
Forum: Tandem Cycling
08-24-11, 02:42 AM
Replies: 11
Views: 2,112
Posted By IanS

Thanks for the suggestions. I've sent an email to...

Thanks for the suggestions. I've sent an email to DT Swiss anyway as suggested to see what they say. I also wanted to know whether it was possible to set this hub up as a fixed wheel. It would seem...
Forum: Tandem Cycling
08-23-11, 02:59 AM
Replies: 11
Views: 2,112
Posted By IanS

Bontrager Racelite tandem free wheel failure

The free wheel on our rear Bontrager Racelite tandem wheel went last week so we thought we'd just replace it. However, when my pilot took the rear hub apart the mechaism is totally different to...
Forum: Tandem Cycling
07-03-11, 04:30 PM
Replies: 16
Views: 1,604
Posted By IanS

Wow. Thanks for all the feedback. Sounds like...

Wow. Thanks for all the feedback. Sounds like this is not an uncommon problem.

Just to clarify though, the braking itself is fine. It's just the continual adjustment and associated faff that is...
Forum: Tandem Cycling
06-28-11, 09:32 AM
Replies: 16
Views: 1,604
Posted By IanS

Apologies if this is an obvious question but why...

Apologies if this is an obvious question but why isn't this a problem for solo bikes with STI levers? Or bikes set up for TTs with integrated brakes that have limited travel? Is it because they don't...
Forum: Tandem Cycling
06-28-11, 07:25 AM
Replies: 16
Views: 1,604
Posted By IanS

Is there an off-the-shelf product that comes with...

Is there an off-the-shelf product that comes with everything in one? Or do we need to buy the brakes and travel agent/adjuster separately?
Forum: Tandem Cycling
06-28-11, 04:38 AM
Replies: 16
Views: 1,604
Posted By IanS

Replacement rim brake options

The brakes on my Trek T2000 are over 5 years old now and done around 30,000 miles. Most of our rides involve a lot of climbing and long slow technical descents so it is vital that we have effective...
Forum: Tandem Cycling
06-19-11, 12:55 PM
Replies: 23
Views: 1,948
Posted By IanS

We've had not so much of a squeak but more or a...

We've had not so much of a squeak but more or a grinding or rubbing sound that the frame itself seem to amplify. The source seems to come from the rear of the bike and is a kind of hunting sound and...
Forum: Tandem Cycling
05-27-11, 03:17 AM
Replies: 33
Views: 9,004
Posted By IanS

I suspect the approximations for Chris Horner +...

I suspect the approximations for Chris Horner + Clone on a tandem given above by the calculator are based on Chris and his clone riding in perfect synchronisation throughout every pedal cycle, all...
Forum: Tandem Cycling
05-25-11, 04:24 PM
Replies: 33
Views: 9,004
Posted By IanS

Thanks for the reference to that thread on power...

Thanks for the reference to that thread on power loss. Can't think where I got 16% from. I think I'm going senile.

Nevertheless, this still doesn't change my personal belief that the advantage...
Forum: Tandem Cycling
05-25-11, 09:21 AM
Replies: 33
Views: 9,004
Posted By IanS

I can't remember exactly which thread I got this...

I can't remember exactly which thread I got this figure of 16% in loss of power in the drive train but I am pretty sure it was something like that. I remember because it surprised me.

As far as...
Forum: Tandem Cycling
05-25-11, 03:50 AM
Replies: 33
Views: 9,004
Posted By IanS

The statement that tandems have twice the weight...

The statement that tandems have twice the weight and twice the power is just wrong. Yes they have twice the weight approximately (2 x each rider + 2 x solo bike) and yes both riders can try to...
Forum: Tandem Cycling
05-15-11, 02:04 PM
Replies: 16
Views: 1,217
Posted By IanS

After many thousands of miles of riding over many...

After many thousands of miles of riding over many years with different pilots of varying levels of ability, I believe the single most important factor in riding well on a tandem, is riding as one....
Forum: Tandem Cycling
04-15-11, 03:13 AM
Replies: 7
Views: 1,446
Posted By IanS

Hey Dean, apologies if this is obious from the...

Hey Dean, apologies if this is obious from the pics but if I could summarize in words, are you saying that you have used a 145 mm skewer, a 7.5 mm spacer on the non-drive side, and a custom hanger on...
Forum: Tandem Cycling
04-13-11, 02:51 AM
Replies: 7
Views: 1,446
Posted By IanS

Rear disc wheel on tandem

A couple of questions:

1. I have a standard Corrima C+ rear road disc wheel that I am looking to use on my tandem for TTs. However, the rear spacing on my tandem is 145 mm and the disc is spaced...
Forum: Tandem Cycling
03-31-11, 03:04 AM
Replies: 8
Views: 774
Posted By IanS

OK, the FSA SL-K cranks mentioned above were just...

OK, the FSA SL-K cranks mentioned above were just too good an offer to refuse given my need to go 175, even including duty and shipping to the UK. Hopefully receive them soon.

flyag1 - Did you...
Forum: Tandem Cycling
03-28-11, 04:19 AM
Replies: 21
Views: 4,823
Posted By IanS

There have been a number of very well presented...

There have been a number of very well presented and interesting points made out by members in this thread and would broadly agree with what has been said. But as someone with a visual impairment who...
Forum: Tandem Cycling
03-22-11, 03:19 AM
Replies: 8
Views: 774
Posted By IanS

I took a closer look at the rear cranks the other...

I took a closer look at the rear cranks the other day and as suggested above, it looks like the cranks are drilled for 170 mm but this leaves about 12 mm of crank beyond the pedal hole. The entire...
Forum: Tandem Cycling
03-19-11, 02:08 PM
Replies: 8
Views: 774
Posted By IanS

Cannondale 2007 RT rear crank options

would like to replace the 170 mm rear crankset on my Cannondale 2007 road tandem with 175 mm cranks. I assumed that I would be able to swap the front LHS 175 mm crank with the rear LHS 170 mm crank,...
Forum: Tandem Cycling
01-28-11, 04:18 AM
Replies: 24
Views: 2,208
Posted By IanS

Just a couple of questions: 1. What are the...

Just a couple of questions:

1. What are the diameters of the boom tube and top tubes? You say they're large diameter but it'd be interesting to know just how large.

2. How long are the rear top...
Forum: Tandem Cycling
09-17-10, 05:13 AM
Replies: 26
Views: 2,894
Posted By IanS

A rigid seat post with a racing seat is the only...

A rigid seat post with a racing seat is the only option for TTs on smooth road surfaces in terms of power delivery. Unfortunately the road around me are less than smooth, and on some TT courses are...
Forum: Tandem Cycling
08-20-10, 03:14 AM
Replies: 1
Views: 507
Posted By IanS

Any members living in Auckland New Zealand?

This is a long shot but I am registered blind and race tandems competitively. There is a chance that i may end up in Auckland for a few months with work and was wondering whether there are any pilots...
Forum: Tandem Cycling
06-15-10, 07:42 AM
Replies: 46
Views: 4,542
Posted By IanS

Very interesting. I think I read on Sheldon's...

Very interesting. I think I read on Sheldon's site that Rohloff only guarantee this hub for use on the equivilent of 170 mm crank and 150 kg of load. I'm not exactly sure what 150 kg of load means...
Forum: Tandem Cycling
11-04-09, 08:43 AM
Replies: 2
Views: 666
Posted By IanS

Options for rear cross-over cranks for C'dale 2007 road tandem

Hi

I've just bough a 2007 Cannondale road tandem. This comes with 175mm and 170mm cranks. I am looking to replace the 170s on the back with at least 175mm which I assumed would be straight forward...
Forum: Tandem Cycling
05-26-09, 03:07 AM
Replies: 10
Views: 1,074
Posted By IanS

This perhaps should be a topic for a new thread...

This perhaps should be a topic for a new thread but as a blind stoker struggling to find pilots, I'm constantly having to try and convince them that riding the tandem will be good for their solo...
Forum: Tandem Cycling
05-29-08, 03:26 AM
Replies: 19
Views: 3,437
Posted By IanS

Very interesting. Accepting potential measurement...

Very interesting. Accepting potential measurement issues and small sample size, I'm happy with an upper bound for mechanical losses of 7% which sounds reasonable to me. Probably a bit less but...
Forum: Tandem Cycling
05-28-08, 03:45 AM
Replies: 19
Views: 3,437
Posted By IanS

Completely agree with the above and that in...

Completely agree with the above and that in theory, tandems should not be any slower up hills. Also agree with the reasoning above why tandems are perceived to be slower up hills. However, I'm just...
Forum: Tandem Cycling
05-27-08, 08:54 AM
Replies: 19
Views: 3,437
Posted By IanS

Whilst I can accept that mechanical losses should...

Whilst I can accept that mechanical losses should be low in theory by comparison this doesn't explain why my pilot believed he was having to put in a lot more effort to maintain the same speed/power...
Forum: Tandem Cycling
05-27-08, 03:50 AM
Replies: 19
Views: 3,437
Posted By IanS

Power loss in transmission

After reading the recent post on aerodynamics with interest, I thought I ask whether anyone has any scientific data on the power loss in transmission on a tandem.

As tandemgeek pointed out in the...
Forum: Tandem Cycling
03-18-08, 04:11 AM
Replies: 23
Views: 1,999
Posted By IanS

My first set of Bontrager's went 1500 miles...

My first set of Bontrager's went 1500 miles before developing an annoying grinding noise which turned out to be the spokes rubbing on the outer edge of the flange as the wheel/frame flexed under high...
Forum: Tandem Cycling
01-26-08, 04:13 AM
Replies: 8
Views: 1,328
Posted By IanS

You'll have to pardon my ignorance but is there a...

You'll have to pardon my ignorance but is there a lot of difference between the CXP30's and the 'newer' CXP33? Three are loads of them around and assume they could just be a more recent model? I'm...
Forum: Tandem Cycling
01-23-08, 03:49 AM
Replies: 8
Views: 1,328
Posted By IanS

The reason for my question is that, as you...

The reason for my question is that, as you suggest, I'm finding it very hard to find a CXP30 with 32h in the UK. I've also seen the Topolini AX3.0 and Campy Atlanta rims mentioned by people using...
Forum: Tandem Cycling
01-22-08, 03:57 AM
Replies: 8
Views: 1,328
Posted By IanS

32 hole rim for track tandem recommendations?

Hi

We've just bought a second hand power tap with a 32 hole hub from another tandem pair here in the UK. They used it on a of Mavic CXP 30 rim but these seem to be hard to cme by by all accounts....
Forum: Tandem Cycling
11-19-07, 04:42 AM
Replies: 17
Views: 2,250
Posted By IanS

Apologies for my ignorance but what are unidisc...

Apologies for my ignorance but what are unidisc covers? I've been looking for a rear road disc for my tandem and have only found the Corima C+ double skinned carbon. But I'm concerned that if it...
Forum: Tandem Cycling
08-23-07, 04:09 AM
Replies: 13
Views: 1,305
Posted By IanS

Sorry, showing my ignorance!

Sorry, showing my ignorance!
Forum: Tandem Cycling
08-22-07, 03:40 PM
Replies: 13
Views: 1,305
Posted By IanS

Excellent! How far was it? What was your time? ...

Excellent! How far was it? What was your time?

I'm constantly trying to explain to people that tandem riding is about riding together, so unless Mr Fish and his partner happen to be Lance and...
Forum: Tandem Cycling
08-18-07, 04:52 PM
Replies: 29
Views: 2,237
Posted By IanS

Very interesting and points well made by all. I'm...

Very interesting and points well made by all. I'm pursuaded of the argument that energy stored in the frame *can* be returned in a manner that can 'drive' the rear wheel. But as others have...
Forum: Tandem Cycling
08-18-07, 04:12 PM
Replies: 13
Views: 1,305
Posted By IanS

At last! Somebody who has heard of it! Yes, I...

At last! Somebody who has heard of it! Yes, I would be interested to know who built it if you could ask. It just looks right to me from a design perspective. Not quite UCI legal but suspect the...
Forum: Tandem Cycling
08-17-07, 09:11 AM
Replies: 13
Views: 1,305
Posted By IanS

Who's got one of these beauty's?

http://www.valleybicycle.com/images/lemond_tandem.jpg

I've tried to track down who actually made this lovely bike but no joy. Lemonde, now owned by Trek, tell me they never did.

Has anyone...
Forum: Tandem Cycling
08-17-07, 09:06 AM
Replies: 29
Views: 2,237
Posted By IanS

I'm affraid I haven't had time to read your...

I'm affraid I haven't had time to read your reference yet but will do later. Just thought I'd propose another argument that may help. And again, I'm no engineer and can't explain why anyone who knows...
Forum: Tandem Cycling
08-17-07, 05:29 AM
Replies: 29
Views: 2,237
Posted By IanS

Very interesting and wise words again thanks. Not...

Very interesting and wise words again thanks. Not exactly sure why someone suggested that frame flex wouldn't affect power to the rear wheel though? Surely if power is being dissapated through frame...
Forum: Tandem Cycling
08-16-07, 12:13 PM
Replies: 29
Views: 2,237
Posted By IanS

Absolutely agree with everyone's saying. And I...

Absolutely agree with everyone's saying. And I know that wall thickness is also important. But I don't know how thick the carbon tubes are, nor the C'dales alluminium 60mm diameter tubing. All I know...
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