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Search: Posts Made By: tandemdr
Showing results 1 to 42 of 42
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Forum: Tandem Cycling
04-01-24, 07:36 PM
Replies: 6
Views: 407
Posted By tandemdr

A bit late on this but if it still helps,...

A bit late on this but if it still helps, https://www.PrecisionTandems.com/catalogpartsweb.htm#rims has one remaing 26"/559 Velocity Chukker Rim, in black with a machined sidewall rim. This now...
Forum: Tandem Cycling
12-28-23, 02:12 PM
Replies: 1
Views: 521
Posted By tandemdr

Usually the simple and easy solution is to just...

Usually the simple and easy solution is to just place a piece of brake housing between the cable bridge below the stoker bottom bracket and the caliper. It then acts as a cable guide between those...
Forum: Tandem Cycling
11-30-23, 02:39 PM
Replies: 27
Views: 7,422
Posted By tandemdr

Here is a link to the official DT Swiss' special...

Here is a link to the official DT Swiss' special lube.

https://www.precisiontandems.com/cat_pics/ludtgrease.jpg
Forum: Tandem Cycling
11-03-23, 07:22 PM
Replies: 25
Views: 1,517
Posted By tandemdr

We have toured on a 32 spoke Velocity Dyad rear...

We have toured on a 32 spoke Velocity Dyad rear 145 spaced near dishless wheel. That said the weight of the team and touring gear on board and tire width all need to be of consideration, along with...
Forum: Tandem Cycling
11-02-23, 05:30 PM
Replies: 8
Views: 1,185
Posted By tandemdr

We have seen two quints, 3 quads, and something...

We have seen two quints, 3 quads, and something like 5-7 triplets at one or two MTRs several years ago back when we were driving the pace both on the bikes and in the really long bike market. Many...
Forum: Tandem Cycling
05-12-23, 02:16 PM
Replies: 3
Views: 689
Posted By tandemdr

There is an FSA chainring with an integrated...

There is an FSA chainring with an integrated spider that allows for a 30/46T combination as an alternative gear set.
Forum: Tandem Cycling
03-31-23, 12:57 PM
Replies: 19
Views: 3,672
Posted By tandemdr

Well said and fully agree. The alone time without...

Well said and fully agree. The alone time without any distractions and non face to face verbal interaction is a real eye opener as what comes out really reveals what is going on in their young minds....
Forum: Tandem Cycling
03-17-23, 03:24 PM
Replies: 19
Views: 3,672
Posted By tandemdr

This thread really peaked my interest as it...

This thread really peaked my interest as it brought forth so many memories, that will be cherished forever. And to share some of that, our unparalleled experience (AFAIK) includes riding with the...
Forum: Tandem Cycling
02-09-22, 08:46 PM
Replies: 15
Views: 3,580
Posted By tandemdr

Random thoughts... Good to know it is a 73mm...

Random thoughts...

Good to know it is a 73mm width shell. That configuration uses no spacers under the bottom bracket cups and there are likely none given the stated visible spring action left in...
Forum: Tandem Cycling
02-09-22, 12:33 PM
Replies: 15
Views: 3,580
Posted By tandemdr

What width is the bottom bracket shell and...

What width is the bottom bracket shell and eccentric? 68mm or 73mm?
Forum: Tandem Cycling
07-19-21, 01:47 PM
Replies: 37
Views: 9,648
Posted By tandemdr

The FSA bottom brackets are the same, front and...

The FSA bottom brackets are the same, front and rear, Gossamer or SL-K light, on the newer version of the crank, most readily identified by having black cups which utilizes a yellow gold aluminum...
Forum: Tandem Cycling
07-17-21, 02:35 PM
Replies: 37
Views: 9,648
Posted By tandemdr

Consider mounting your Gates sprockets on the...

Consider mounting your Gates sprockets on the inside of the spider thus shortening the lever arm against the bottom brackets which will also reduce the frame bowing tendency. The newer Gossamer...
Forum: Tandem Cycling
04-29-21, 01:45 PM
Replies: 5
Views: 1,277
Posted By tandemdr

Assuming the spacer moves the drum outboard it...

Assuming the spacer moves the drum outboard it would change the brake shoe path inside of the drum. Perhaps the brake shoe path was not lining up with the internal drum braking surface. If that is...
Forum: Tandem Cycling
03-01-21, 02:44 PM
Replies: 29
Views: 13,501
Posted By tandemdr

https://www.precisiontandems.com/purdypaint.htm#co...

https://www.precisiontandems.com/purdypaint.htm#comotion (https://www.precisiontandems.com/purdypaint.htm)
Forum: Tandem Cycling
03-01-21, 02:39 PM
Replies: 6
Views: 984
Posted By tandemdr

If they were recently mounted, they will likely...

If they were recently mounted, they will likely stretch out to 28mm or beyond, with time.
Forum: Tandem Cycling
01-21-21, 02:20 PM
Replies: 7
Views: 1,976
Posted By tandemdr

Many lengths listed here: ...

Many lengths listed here:
https://www.precisiontandems.com/catalogpartsweb.htm#cables
Forum: Tandem Cycling
01-19-21, 02:49 AM
Replies: 16
Views: 1,797
Posted By tandemdr

https://www.precisiontandems.com/artpropermethod.h...

https://www.precisiontandems.com/artpropermethod.htm
Here you go! Score!👍

https://www.precisiontandems.com/bran2015/bran_2015_quint.MOV
VIDEO OF QUINT - LOAD UP AND ROLL!...
Forum: Tandem Cycling
10-25-20, 12:56 PM
Replies: 54
Views: 9,442
Posted By tandemdr

Agreed and it is more important than ever with...

Agreed and it is more important than ever with smaller rings given the greater wear from increased chain tension and fewer teeth sharing the load.
Forum: Tandem Cycling
10-25-20, 12:52 PM
Replies: 54
Views: 9,442
Posted By tandemdr

Very good to know! Thanks for the confirmation...

Very good to know! Thanks for the confirmation and the forensic analysis.
Forum: Tandem Cycling
10-02-20, 02:09 PM
Replies: 54
Views: 9,442
Posted By tandemdr

I look forward to the results of the new chain...

I look forward to the results of the new chain and smaller ring test ride and will be surprised if it does not change for the better despite the greater torque from the ring and cog being smaller....
Forum: Tandem Cycling
10-02-20, 01:11 PM
Replies: 54
Views: 9,442
Posted By tandemdr

This is an interesting thread in that it...

This is an interesting thread in that it parallels mostly vast experience on 2 seat tandems, triplets, quads, and quints, having really high torque involved. The early on described symptoms, now...
Forum: Tandem Cycling
05-29-20, 01:59 PM
Replies: 5
Views: 871
Posted By tandemdr

Assuming your have the cranks setup in syn, if...

Assuming your have the cranks setup in syn, if you can get the tight spot to be on the power or down stroke, I would think it would even out over time. Situations like this that I have seen resultant...
Forum: Tandem Cycling
05-29-20, 01:15 PM
Replies: 5
Views: 871
Posted By tandemdr

Try rotating the one ring 90 degrees out of sync...

Try rotating the one ring 90 degrees out of sync from the established wear patterns that develop. I suspect that will help some.
Forum: Tandem Cycling
05-15-20, 03:03 PM
Replies: 7
Views: 1,218
Posted By tandemdr

How many speeds? ...

How many speeds?
https://www.precisiontandems.com/cat_pics/lddagerindicator.jpg
Forum: Tandem Cycling
04-25-19, 05:32 PM
Replies: 27
Views: 10,839
Posted By tandemdr

Thanks! They are all expert stokers aside from...

Thanks! They are all expert stokers aside from the lanky lad in the middle, the non cyclist boyfriend. He too was an expert by the end of the week!
Forum: Tandem Cycling
04-25-19, 03:46 PM
Replies: 27
Views: 10,839
Posted By tandemdr

1. VIDEO OF QUINT - LOAD UP AND ROLL!...

1. VIDEO OF QUINT - LOAD UP AND ROLL! (https://www.precisiontandems.com/bran2015/bran_2015_quint.MOV) Starts and stops with triplets are the same as a 2 seat tandem with a light experienced kid on...
Forum: Tandem Cycling
04-24-19, 12:09 PM
Replies: 14
Views: 6,647
Posted By tandemdr

This article about triplets and children is a...

This article about triplets and children is a good place to start.
https://www.precisiontandems.com/artkidsbymccready.htm
Forum: Tandem Cycling
04-22-19, 11:45 AM
Replies: 11
Views: 4,008
Posted By tandemdr

EBC Gold seem to be preferred by most and have...

EBC Gold seem to be preferred by most and have certainly passed the test of time. The HH suffix indicates having the "high durability sintered metal compound for longer life in arduous conditions."...
Forum: Tandem Cycling
04-18-19, 02:14 PM
Replies: 8
Views: 3,095
Posted By tandemdr

Awesome job! Thanks for sharing! I was once...

Awesome job! Thanks for sharing!
I was once told, more than once, that enjoy those precious times together as the time goes really fast. You know what? They were right and it really hits home when...
Forum: Tandem Cycling
02-02-19, 02:44 PM
Replies: 34
Views: 16,820
Posted By tandemdr

In all the years, since the DT 540 introduction...

In all the years, since the DT 540 introduction used on tandems, I have not seen a ratchet look like this. It makes me think the metal on the one side is extra brittle for whatever reason so I don't...
Forum: Tandem Cycling
11-27-18, 12:54 PM
Replies: 15
Views: 4,282
Posted By tandemdr

Smaller timing chainrings do result in a mushier...

Smaller timing chainrings do result in a mushier feel (resultant of increased frame flex), greater chain tension, faster wear of everything, bottom brackets included, and loss of efficiency from...
Forum: Tandem Cycling
10-31-18, 10:33 AM
Replies: 16
Views: 1,845
Posted By tandemdr

I am curious, what length cranks are being used...

I am curious, what length cranks are being used by the child? At first glance it appears that the pedal circle may be as much as 3.5" too large for the leg length, which could seriously over work his...
Forum: Tandem Cycling
07-31-18, 03:24 PM
Replies: 14
Views: 2,294
Posted By tandemdr

A Chevrolet Cruze was another one not mentioned...

A Chevrolet Cruze was another one not mentioned that pulled an honest 40 mpg, too. We also had large panniers and bags for being self supported in addition to gear needed for tent camping.
Forum: Tandem Cycling
07-27-18, 12:15 PM
Replies: 14
Views: 2,294
Posted By tandemdr

If traveling with only two people a compact car...

If traveling with only two people a compact car should work fine saving on the rental and gas. We have successfully and quite easily carried a size large NON coupled tandem inside of several small...
Forum: Tandem Cycling
07-01-17, 11:52 AM
Replies: 6
Views: 2,780
Posted By tandemdr

Here is a picture of one. ...

Here is a picture of one.

precisiontandems.com/cat_pics/sm1.25quill_adapter.jpg
Forum: Tandem Cycling
02-04-17, 02:32 PM
Replies: 46
Views: 10,417
Posted By tandemdr

For my own edification, I just weighed a factory...

For my own edification, I just weighed a factory Co-Motion timing chain and FSA Gossamer rings at 562g.
The Gates CDX system came in at 277g, or 290g lighter equating to a .639 pound savings, nearly...
Forum: Tandem Cycling
01-15-17, 02:16 PM
Replies: 3
Views: 1,252
Posted By tandemdr

Prior to 1997 I would expect Co-Motion Speedsters...

Prior to 1997 I would expect Co-Motion Speedsters to have a dropout spacing of 140mm. From 1997 going forward they should be 145mm.
Forum: Tandem Cycling
12-15-16, 06:53 AM
Replies: 4
Views: 1,286
Posted By tandemdr

Not sure I can message you but may be able to...

Not sure I can message you but may be able to help. I do have a new bike take-off, tandem disc brake steel Co-Motion fork with a 215mm steerer, pewter in color, if that helps.
Mark
Precision Tandems
Forum: Tandem Cycling
12-06-13, 03:55 PM
Replies: 9
Views: 1,250
Posted By tandemdr

Trying to help, not break forum rules but an...

Trying to help, not break forum rules but an unable to send a private message. I likely have original decals like what you are looking for from the 90's that look like this: ...
Forum: Tandem Cycling
02-28-13, 10:35 AM
Replies: 105
Views: 16,985
Posted By tandemdr

The Gates CDC and CDX 69T cog systems are...

The Gates CDC and CDX 69T cog systems are designed for the 724mm center-to-center boom lengths. In my experience the eccentric must be able to reduce the bottom bracket c-c distance to 720mm for the...
Forum: Tandem Cycling
01-15-13, 08:49 AM
Replies: 109
Views: 16,912
Posted By tandemdr

Here is a picture of a Precision Quint with...

Here is a picture of a Precision Quint with bonded S&S couplers taken in 2008 that is on the S&S site.
http://sandsmachine.com/a_prec_001.htm
Forum: Tandem Cycling
02-28-12, 06:55 AM
Replies: 11
Views: 13,286
Posted By tandemdr

http://www.precisiontandems.com/cat_pics/pushrader...

http://www.precisiontandems.com/cat_pics/pushradertopresta.jpg

$5
Showing results 1 to 42 of 42


 
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