Road Cycling Essentials

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Will a dura ace cs 7900 12-25 cassette be compatible with a 105 rear mech? Ive bought some wheels that come with a dura ace cassette. the cassette i have on at the moment is a 105 11-25. I would have thought that they are compatible but just asking to be sure.

edit: just found a compatibility chart and it looks like it will work fine
 
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[DOD]Asprilla;22704443 said:
Indeed. However, I don't really want my fork drop outs scraping on the floor. Especially not the full carbon ones.
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thats why i bought a cable just long enough to go through the wheels for that reason, but as said above best to maximise the U-lock's space
 
R0B75 said:
I've just been looking at the Tour of Britain route, specifically the 2nd stage on Monday 10th as it passes through Derbyshire not far from me. There is a climb they have classified as Category 1.

Is that the easiest or the hardest?
Strava classify it as Category 4.
:confused:
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There are no rules/guidelines to classify climbs.
They will look at all the climbs over the route and start with the biggest ones and categorise them as 'Cat 1' and work back to the smallest climbs. So the climbs on the ToB will be categorised higher than Strava ones (because strava will compare the climbs to every other climb in the world to categorise it).
You often see this sort of thing where the Tour De France, Tour de Suisse and Critérium du Dauphiné overlap (as they all have stages around the alps). The exact same climbs can be included in the different races but categorised differently.
 
touch said:
There are no rules/guidelines to classify climbs.
They will look at all the climbs over the route and start with the biggest ones and categorise them as 'Cat 1' and work back to the smallest climbs. So the climbs on the ToB will be categorised higher than Strava ones (because strava will compare the climbs to every other climb in the world to categorise it).
You often see this sort of thing where the Tour De France, Tour de Suisse and Critérium du Dauphiné overlap (as they all have stages around the alps). The exact same climbs can be included in the different races but categorised differently.
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I see, that makes sense. Thanks
 
touch said:
So the climbs on the ToB will be categorised higher than Strava ones (because strava will compare the climbs to every other climb in the world to categorise it).
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Just had a look on Strava. In their ranking system, there are no Cat 1 road climbs in the UK.
 
Streeteh said:
Ya big wuss! :p I often cycle with an Abus Granite X-Plus (which weighs just a little bit more) and an Abus chain lock in my backpack. They don't add any noticable time to my commute at all, they barely add any weight in comparison to the huge mass that is a human being. Will admit though, after more than 8 miles they do start to make my back ache a bit, but a 5 min break usually sorts that.
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I've one a little like of those (kryptonite s4) and carry it each day. no worries.
 
ShiWarrior said:
stupid question, but i dont see the point of bib shorts, how do they work exactly?
ive always bought normal cycling shorts (padded)
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Keep yer back warmer and are more comfortable all round than normal shorts as you aren't forever 'hoiking' them up by the waistband when they start slipping down. :cool:
 
Draeger said:
Keep yer back warmer and are more comfortable all round than normal shorts as you aren't forever 'hoiking' them up by the waistband when they start slipping down. :cool:
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lol oh I see, good that my shorts stay in the correct poisition all the time then :p

dont cycle in Winter, but if i do i'll get some bibs! :D
 
ShiWarrior said:
i dont see the point of bib shorts
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This is why:
ShiWarrior said:
ive always bought normal cycling shorts
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Buy some bibshorts and you'll realise why they are better.

-They dont slip down.
-The waistband doesnt dig in.
-They are slightly warmer and dont leave a gap between the top of your shorts and the bottom of your shirt where spray from the back wheels gets in.
-It's what the pros wear ;)
 
touch said:
There are no rules/guidelines to classify climbs.
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The quite possibly apocryphal tale is that the TdF race organisers used to classify climbs based on the gear they had to use in whatever crummy Citroen they were driving at the time. So a hill that could be climbed entirely in 4th gear was cat 4, but if you had to drop to 3rd it was cat 3, etc etc. The HC climbs were those that had to be climbed in reverse gear, reverse being geared even lower than 1st.

Mercifully Strava bases it's categorisation on some proper maths. Interestingly, that link refers to official UCI categorisations, so maybe there are some proper rules out there? That being said, it does make the point that those categorisations are subjective e.g. depending on where climbs occur in a stage, etc.
 
I thought the categories are also affected by where in the stage they are - two identical climbs may be different categories if one is 5k into a stage and one is 5k from the end.

Plus I don't know about you but I doubt I would be able to cycle up any hill that a car couldn't get up in first gear! Not unless it was about ten yards long anyway. Would be cool if it were true though.
 
ShiWarrior said:

:(
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I wouldn't worry about that problem. I had a Kryptonite New York lock which was also used a round key and could be opened with a biro. Kryptonite sent me an improved version under warranty for the new design and they don't make that type of lock anymore. I keep meaning to try a biro on the old one but haven't got round to it yet!
 
PardonTheWait said:
Plus I don't know about you but I doubt I would be able to cycle up any hill that a car couldn't get up in first gear! Not unless it was about ten yards long anyway. Would be cool if it were true though.
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It's important to remember that the car in question was from several decades ago and, more importantly, was French.

I'm now trying to come up with a joke for why the car was more powerful in reverse...
 
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