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Search: Posts Made By: markjenn
Forum: Classic & Vintage 07-26-16, 03:14 PM
Replies: 35
Views: 799
Posted By markjenn
We're getting off-tangent here with the usual...

We're getting off-tangent here with the usual discussions of alum fatiguue and its ride quality vs. other materials, but to get back to the OP's question, I think the idea that an alum frame...
Forum: Bicycle Mechanics 07-25-16, 11:36 AM
Replies: 90
Views: 2,394
Posted By markjenn
Certainly a deep gouge or something similar MIGHT...

Certainly a deep gouge or something similar MIGHT eventually compromise strength, but we have people on this thread saying that you can induce a failure-inducing crack by leaning the bike up against...
Forum: Bicycle Mechanics 07-24-16, 09:27 PM
Replies: 90
Views: 2,394
Posted By markjenn
Your "guess" would be wrong. - Mark

Your "guess" would be wrong.

- Mark
Forum: Professional Cycling For the Fans 07-24-16, 09:06 PM
Replies: 17
Views: 607
Posted By markjenn
You make some good points, but they'd be made a...

You make some good points, but they'd be made a lot better without the Bobke ranting. We get it, you don't like Roll.

- Mark
Forum: Bicycle Mechanics 07-13-16, 10:30 PM
Replies: 22
Views: 655
Posted By markjenn
If you're reasonably handy with mechanical...

If you're reasonably handy with mechanical things, there is no reason you can't self-teach yourself to a pretty high level of bike mechanics - bikes are very approachable and most things are out in...
Forum: Advocacy & Safety 07-10-16, 12:14 AM
Replies: 10
Views: 432
Posted By markjenn
Which is why they're essentially meaningless. ...

Which is why they're essentially meaningless. What good is a risk statistic when it doesn't take into account the size of the population exposed to the risk or the amount of time they're exposed? ...
Forum: Bicycle Mechanics 07-10-16, 12:04 AM
Replies: 20
Views: 515
Posted By markjenn
I will agree with what everyone else has said: ...

I will agree with what everyone else has said: essentially unlimited in perfect conditions, a thousand or two miles in really poor conditions without much maintenance. If you anticipate riding a...
Forum: Classic & Vintage 07-05-16, 10:51 PM
Replies: 8
Views: 219
Posted By markjenn
Yes, more info is required. Like what is...

Yes, more info is required. Like what is rubbing. Certainly the limit screws will probably require adjustment. And you may have to adjust the FD up/down when the BB changes. Or you could have...
Forum: General Cycling Discussion 06-27-16, 11:38 AM
Replies: 44
Views: 1,375
Posted By markjenn
Slippery subject with 50 state laws and wide...

Slippery subject with 50 state laws and wide variability in interpretation and enforcement zeal. In a car, there's really no doubt about it.... it's rude, dangerous, and will generally get you...
Forum: Training & Nutrition 06-24-16, 08:59 PM
Replies: 27
Views: 1,134
Posted By markjenn
Bingo. There is a lot of discussion on this...

Bingo. There is a lot of discussion on this thread about perception of effort but the physics are irrefutable - for a fixed amount of time to complete, a hilly route takes more actual effort (e.g.,...
Forum: Bicycle Mechanics 06-18-16, 08:49 PM
Replies: 6
Views: 367
Posted By markjenn
Good point, although typically the largest cog is...

Good point, although typically the largest cog is where the pulley wheel and cog are the closest and therefore the combo that governs this adjustment. You want a small gap so that the chain doesn't...
Forum: Bicycle Mechanics 06-18-16, 04:41 AM
Replies: 6
Views: 367
Posted By markjenn
I'll avoid the high/low terms as they are often a...

I'll avoid the high/low terms as they are often a source of confusion.

You set the smallest cog limit with the cable slack, disconnected if you like. Then tighen the cable to remove all he slack...
Forum: Classic & Vintage 06-03-16, 06:53 PM
Replies: 66
Views: 1,575
Posted By markjenn
Disk brakes with rearward mounted calipers do...

Disk brakes with rearward mounted calipers do create a downward force at the axle that tends to eject the axle from the dropouts. This is well known. A properly tightened skewer has plenty of...
Forum: Classic & Vintage 06-03-16, 03:15 PM
Replies: 66
Views: 1,575
Posted By markjenn
People who think they will never make a human...

People who think they will never make a human mistake with a mission-critical mechanical system are people who haven't lived long enough to make a mistake yet. The small inconvenience to removing...
Forum: Road Cycling 06-02-16, 10:14 AM
Replies: 75
Views: 4,637
Posted By markjenn
With current models, the weight penalty of discs...

With current models, the weight penalty of discs is about 0.5 lbs, not 1-2.

- Mark
Forum: Road Cycling 06-01-16, 08:29 PM
Replies: 75
Views: 4,637
Posted By markjenn
I've been considering a Roubaix for the past...

I've been considering a Roubaix for the past couple years and by all accounts, it's a great bike. I have noticed a lot of people who are cross-shopping it and the Domane end up getting the Domane. ...
Forum: Training & Nutrition 05-28-16, 02:42 PM
Replies: 27
Views: 1,134
Posted By markjenn
The physics dictate that for equal power output,...

The physics dictate that for equal power output, you're going to go faster on a flat course. Or, to look at it another way, for equal overall time, you're going to have to work harder on a hilly...
Forum: Recreational Cyclocross and Gravelbiking 05-27-16, 12:38 PM
Replies: 27
Views: 1,654
Posted By markjenn
Again, not withstanding pacelines or pedaling...

Again, not withstanding pacelines or pedaling faster than about 28 mph, it's a fine setup for the road also which is what the OP asked about.

- Mark
Forum: Recreational Cyclocross and Gravelbiking 05-27-16, 01:15 AM
Replies: 27
Views: 1,654
Posted By markjenn
I'm right now converting a 34/50 front, 12-28...

I'm right now converting a 34/50 front, 12-28 rear CX bike (that sees mostly road work and occasional gravel trails) to 1x with a 40t front and 11-36 rear. My gear range goes from 33-113 to 30-98...
Forum: Bicycle Mechanics 05-16-16, 11:09 PM
Replies: 11
Views: 330
Posted By markjenn
If the spindle was symmetric (many are not), then...

If the spindle was symmetric (many are not), then theoretically what you're saying is possible, but measurement of chainline and the relationship of chainline to spindle isn't standardized. All in...
Forum: Road Cycling 05-10-16, 02:46 PM
Replies: 26
Views: 731
Posted By markjenn
Go 1x. Except for loaded touring (where one...

Go 1x. Except for loaded touring (where one generally doesn't give a rip about cosmetics anyway), FDs should go the way of CRT's and VCR's.

- Mark
Forum: Bicycle Mechanics 05-09-16, 05:19 PM
Replies: 13
Views: 382
Posted By markjenn
While you can get acceptable results with either...

While you can get acceptable results with either a beam or clicker, after using three different types for many years (beam, clicker, and digital), my assessment is that the clickers meet this bar...
Forum: Bicycle Mechanics 05-08-16, 04:50 PM
Replies: 13
Views: 382
Posted By markjenn
Yes, the BBT-9 works on both Shimano and SRAM...

Yes, the BBT-9 works on both Shimano and SRAM external bearing BB's, but as the previous post mentions, there is no provision to use the tool with a torque wrench; you'll need to buy a "socket style"...
Forum: Pacific Northwest 05-05-16, 11:08 AM
Replies: 16
Views: 521
Posted By markjenn
I don't like the highway that much either, but...

I don't like the highway that much either, but the OP's route has the only detour that is relatively easy; all the others have pretty big costs in distance and hills. Both the N (up to Langley) and...
Forum: Pacific Northwest 05-04-16, 08:01 PM
Replies: 16
Views: 521
Posted By markjenn
It's a nice ride but surprisingly hilly so if...

It's a nice ride but surprisingly hilly so if you're planning on making a specific ferry, allow extra time for the ups and downs. 525 is the main arterial from the S end of the island to Oak Harbor...
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