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Search: Posts Made By: PeteHski
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Forum: Road Cycling
09-18-21, 04:27 AM
Replies: 64
Views: 971
Posted By PeteHski

This is a very thought provoking thread. Just...

This is a very thought provoking thread. Just wanted to comment on a couple of point raised:-

1. Crank length. Here's a really good article summarising recent thinking on the subject of ideal...
Forum: Road Cycling
09-18-21, 03:55 AM
Replies: 22
Views: 486
Posted By PeteHski

Yeah I like that idea. It is a tricky...

Yeah I like that idea. It is a tricky measurement to get right when comparing bikes with different saddle shapes and lengths. Measuring from the saddle nose to the bars only works if you are...
09-17-21, 06:40 AM
Replies: 61
Views: 901
Posted By PeteHski

It is definitely doable with your background, but...

It is definitely doable with your background, but not very long to prepare. See how the 60 mile ride goes and decide from there. If that goes well, you could try 75 miles the following weekend. ...
Forum: Road Cycling
09-17-21, 04:08 AM
Replies: 21
Views: 527
Posted By PeteHski

If your frame can fit 28s, I would step up to...

If your frame can fit 28s, I would step up to those and make life easier. If not, I would just try the lower pressures anyway. At 56 kg you will probably be fine.
Forum: Road Cycling
09-16-21, 12:23 PM
Replies: 22
Views: 486
Posted By PeteHski

Unless you are using the same saddle I wouldn't...

Unless you are using the same saddle I wouldn't go off this measurement alone for reach as saddle nose length can vary a lot between different saddle models - easily an inch or more. So I find it...
09-16-21, 09:59 AM
Replies: 84
Views: 1,915
Posted By PeteHski

Agreed, he was talking bs.

Agreed, he was talking bs.
09-16-21, 09:59 AM
Replies: 84
Views: 1,915
Posted By PeteHski

It's all just semantics in basically saying that...

It's all just semantics in basically saying that it feels "slower" than the other bike. I was just trying to address the red herring of rotational weight in this context. I agree the discussion has...
09-16-21, 09:57 AM
Replies: 84
Views: 1,915
Posted By PeteHski

So let's humour this then shall we? Okay so g =...

So let's humour this then shall we? Okay so g = 32 ft/s^2, 15% gradient = 8.53 degrees. So component of g acting down the slope = g x sin 8.53 = 4.7 ft/s/s. So if you coast from an initial speed...
09-16-21, 07:50 AM
Replies: 84
Views: 1,915
Posted By PeteHski

That wasn't the question though. The rider isn't...

That wasn't the question though. The rider isn't changing here, only the bike.
09-16-21, 07:40 AM
Replies: 84
Views: 1,915
Posted By PeteHski

This is just getting silly now. The only way I...

This is just getting silly now. The only way I can think of to interpret "climbing better" is climbing faster for a given amount of effort. It doesn't matter whether or not you actually climb faster...
09-16-21, 03:14 AM
Replies: 84
Views: 1,915
Posted By PeteHski

Well you have picked up on the only vague and...

Well you have picked up on the only vague and speculative part of that entire excellent post! Mathematical models predicting climbing performance for a given rider power output, bike and hill...
09-15-21, 02:49 PM
Replies: 255
Views: 5,472
Posted By PeteHski

Me neither. That’s why I used the term...

Me neither. That’s why I used the term “diminishing returns” in the thread title. I was interested in the “whatever other advantages” part, but the thread was done and dusted pages ago in that...
09-15-21, 12:15 PM
Replies: 84
Views: 1,915
Posted By PeteHski

Ah I see, you are going to counter argue...

Ah I see, you are going to counter argue Newtonian physics with ermmm..... "Bro-Science". Not going there thanks.
09-15-21, 05:12 AM
Replies: 147
Views: 2,760
Posted By PeteHski

I carry the minimum amount of tools that allow me...

I carry the minimum amount of tools that allow me to fix 99% of the flats/mechanicals I've had in the last 3 decades. Those tools include:-

Micro multi-tool (inc. chain link breaker and tyre...
09-15-21, 04:54 AM
Replies: 84
Views: 1,915
Posted By PeteHski

No idea what your point actually is here? How...

No idea what your point actually is here? How does this relate to one bike climbing better than another with the same rider?
09-15-21, 04:50 AM
Replies: 84
Views: 1,915
Posted By PeteHski

Thanks for this and I agree with all of the above...

Thanks for this and I agree with all of the above (it appears we must have studied the same laws of physics!). My degree is in Mechanical Engineering, so basically applied maths and physics. I also...
09-15-21, 04:25 AM
Replies: 84
Views: 1,915
Posted By PeteHski

That's not why power meters need to "count...

That's not why power meters need to "count RPM"
09-15-21, 04:22 AM
Replies: 255
Views: 5,472
Posted By PeteHski

Well you only had to read post #1 to see that I...

Well you only had to read post #1 to see that I was looking for any objective advantages excluding weight, which I already know all about.

Now you've bothered to explain how you ended up with DA...
09-14-21, 06:37 PM
Replies: 84
Views: 1,915
Posted By PeteHski

Most riders can hold a reasonably steady power...

Most riders can hold a reasonably steady power output. They might well have the odd surge or dip in speed, but I wouldn't say climbing is an exercise in "continuous acceleration". Not unless you...
09-14-21, 06:17 PM
Replies: 84
Views: 1,915
Posted By PeteHski

Just because a cyclist's power output is a bit...

Just because a cyclist's power output is a bit lumpy doesn't change the physics one little bit.
09-14-21, 06:03 PM
Replies: 255
Views: 5,472
Posted By PeteHski

So what are the objective benefits of DA over...

So what are the objective benefits of DA over 105/Ultegra? There's a bit of weight saving (which doesn't interest me) and what else exactly? What is it doing for you to make you love it more than...
Forum: Road Cycling
09-14-21, 03:21 PM
Replies: 118
Views: 3,455
Posted By PeteHski

Spesh is a pretty common shorthand, in the UK at...

Spesh is a pretty common shorthand, in the UK at least. “Special”wouldn’t work on a number of levels. Being a complete word in its own right would make it confusing eg. That Special bike I saw...
Forum: Road Cycling
09-14-21, 02:54 PM
Replies: 268
Views: 19,031
Posted By PeteHski

No, it’s the Europeans who use Bar for tyre...

No, it’s the Europeans who use Bar for tyre pressures. We Brits use psi. Stones and lbs for body weight, although kg is just as widely used these days over here. 1 Stone = 14 lbs.
Forum: Road Cycling
09-14-21, 04:42 AM
Replies: 268
Views: 19,031
Posted By PeteHski

Well firstly 23/25 tubeless are not intended to...

Well firstly 23/25 tubeless are not intended to run as low as 60 psi. More like 80-90 depending on the specific tyre and rider weight. But that does make it harder for the sealant to work...
09-14-21, 04:19 AM
Replies: 255
Views: 5,472
Posted By PeteHski

So are you saying it was an emotional decision? ...

So are you saying it was an emotional decision? I do get that. A lot of purchases can be that way. You buy something simply because you aspire to it, knowing full well it doesn't have any...
09-14-21, 03:59 AM
Replies: 84
Views: 1,915
Posted By PeteHski

Again you are confusing "Acceleration" and...

Again you are confusing "Acceleration" and "Force" here.
This gets a lot easier to understand if you think in terms of applied forces rather than accelerations. Every pedal stroke requires a force....
09-14-21, 03:24 AM
Replies: 84
Views: 1,915
Posted By PeteHski

This is incorrect. When you are climbing up a...

This is incorrect. When you are climbing up a constant slope (eg. 10% gradient) the only thing that changes compared to riding on the flat is the direction (vector) in which the Force of Gravity is...
09-14-21, 03:01 AM
Replies: 84
Views: 1,915
Posted By PeteHski

You are confusing the issue between force and...

You are confusing the issue between force and acceleration here. You are not overcoming "acceleration of gravity", you are overcoming the "Force" of gravity. Gravity only causes the mass to...
09-13-21, 04:28 PM
Replies: 93
Views: 2,077
Posted By PeteHski

Ah I see now. You thought I meant there was no...

Ah I see now. You thought I meant there was no point in having a double chainring right? That's not what I meant at all. I was just literally answering the question in the thread title i.e. no...
Forum: Road Cycling
09-13-21, 03:48 PM
Replies: 9
Views: 288
Posted By PeteHski

Fizik now have a few wide fitting, high volume...

Fizik now have a few wide fitting, high volume options too. I have been using the Fizik Tempo Overcurve R4 Wide for about 12 months now and they are pretty wide with a very generous toe-box. I...
09-13-21, 01:16 PM
Replies: 3
Views: 188
Posted By PeteHski

I've certainly heard of people with a relatively...

I've certainly heard of people with a relatively low Vo2 max having a very high FTP in relation to their Vo2 max power. Like 90%+
I'm not that familiar with VT1 but I presume this means you are the...
09-13-21, 01:05 PM
Replies: 255
Views: 5,472
Posted By PeteHski

I'm not really buying into the idea that DuraAce...

I'm not really buying into the idea that DuraAce lasts any longer than Ultegra or even 105. The latter is actually pretty bombproof IME. A curated mash-up between all 3 of the top tier group sets...
09-13-21, 12:43 PM
Replies: 84
Views: 1,915
Posted By PeteHski

The fact that some of the mass is rotating is not...

The fact that some of the mass is rotating is not even worth talking about in respect of climbing performance. Only the total mass makes any real difference on a slope, governed by trivial Newtonian...
Forum: Road Cycling
09-13-21, 10:49 AM
Replies: 118
Views: 3,455
Posted By PeteHski

I don't think Specialized are fools. But I do...

I don't think Specialized are fools. But I do think they are a hard-nosed business that doesn't care much about the customers. Same as most big brands really. No worse, no better. It doesn't put...
Forum: Road Cycling
09-13-21, 10:40 AM
Replies: 14
Views: 468
Posted By PeteHski

Well the S-Works Aethos is the lightest frame at...

Well the S-Works Aethos is the lightest frame at 585g, but I presume that doesn't include the seat post
I think the Roubaix is around 900g, but again that probably doesn't include the seat post and...
09-13-21, 09:34 AM
Replies: 40
Views: 1,072
Posted By PeteHski

Your requirements are slightly at odds with your...

Your requirements are slightly at odds with your $75-200 range. That is exactly in the price range where they do tend to fall apart easily and ride like crap!
Better to buy a quality bike and...
Forum: Road Cycling
09-13-21, 09:16 AM
Replies: 118
Views: 3,455
Posted By PeteHski

I am sure Mike’s will make a special effort to...

I am sure Mike’s will make a special effort to retain those 400 customers. Specialized don’t even know who they are.

Saying that they would be putting their entire business model at risk by...
Forum: Road Cycling
09-13-21, 07:48 AM
Replies: 18
Views: 452
Posted By PeteHski

It's not actually even amazing value. Thinking...

It's not actually even amazing value. Thinking about it, that's exactly the price I paid for my Giant Defy Advanced Pro 2 in the end of season sales at the end of 2019. Obviously such sales are not...
Forum: Road Cycling
09-13-21, 06:15 AM
Replies: 118
Views: 3,455
Posted By PeteHski

I think people are genuinely worried that...

I think people are genuinely worried that everything being produced in the next 12 months will be snapped up. Probably true for desirable high demand bikes. The shops are no doubt encouraging...
Forum: Road Cycling
09-13-21, 05:55 AM
Replies: 118
Views: 3,455
Posted By PeteHski

Well they are definitely not now are they?

Well they are definitely not now are they?
Forum: Road Cycling
09-13-21, 04:59 AM
Replies: 118
Views: 3,455
Posted By PeteHski

Because they are done deals? 400 bikes sold. I...

Because they are done deals? 400 bikes sold. I guess the reality is that Specialized are well behind on supply and can easily re-sell those 400 (probably not even produced yet) bikes directly or...
Forum: Road Cycling
09-13-21, 04:50 AM
Replies: 18
Views: 452
Posted By PeteHski

I think you will struggle to find a meaningful...

I think you will struggle to find a meaningful review from anyone who actually knows what they are talking about. Probably just have to take a gamble and see if it works out for you.
Forum: Road Cycling
09-13-21, 04:44 AM
Replies: 2
Views: 126
Posted By PeteHski

Those are physically old components and a few...

Those are physically old components and a few steps behind the curve in design too. If the bike has been ridden regularly since 2009 then much of the drivetrain will be pretty worn - obviously...
Forum: Road Cycling
09-13-21, 04:32 AM
Replies: 14
Views: 468
Posted By PeteHski

On this particular point, the short answer is not...

On this particular point, the short answer is not a lot! It comes down to the details really and there are many other frames I could be very happy with. It's a bit like choosing skis these days. ...
Forum: Road Cycling
09-13-21, 04:20 AM
Replies: 14
Views: 468
Posted By PeteHski

Great question! It was a combination of things...

Great question! It was a combination of things coming together.

Foremost, I really like the design of this frame with its sharp focus on low weight, comfort and a timeless, minimalist...
Forum: Road Cycling
09-12-21, 05:47 PM
Replies: 14
Views: 468
Posted By PeteHski

Yeah I fully understand the UCI minimum weight....

Yeah I fully understand the UCI minimum weight. I’m just saying I don’t think my build will come in under it. But it will be fairly light.

I agree on relatively short cranks being a good idea. ...
Forum: Road Cycling
09-12-21, 02:50 PM
Replies: 14
Views: 468
Posted By PeteHski

There is no need to make UCI weight, but I think...

There is no need to make UCI weight, but I think it will end up over the limit anyway. It's a size L frame (medium is 870g I think, so I think large will be over 900g) and with the build I had in...
09-12-21, 01:51 PM
Replies: 4
Views: 209
Posted By PeteHski

Depends how much you want the new Di2 and what...

Depends how much you want the new Di2 and what wheelset you had in mind. There is no right or wrong answer to your question. If it were my money I would probably go with the RC15
09-12-21, 06:44 AM
Replies: 93
Views: 2,077
Posted By PeteHski

I think this poll will be skewed by those using a...

I think this poll will be skewed by those using a 1x setup voting yes where the question is really irrelevant for them.
09-12-21, 06:42 AM
Replies: 16
Views: 665
Posted By PeteHski

This thread reminds me of something a bike fitter...

This thread reminds me of something a bike fitter said recently. On really long rides (300 km Audax) he often lowers his saddle height as fatigue sets in later in the day. I also read about Merckx...
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