Resistance

[themosquitoking]

120 rpm, i would need to re-grease my knee joints to achieve that.

 

[procel]

Count the teeth on your chainrings, to check they are as specified and that Halfords haven't somehow installed a chainring set with biggest ring at 46 and smallest ring on cassette at 40 (!)

 

[Doyleyburger]

I'll check them tomorrow . It's at halfords at the moment for its 6 week service. Will have a count.
Thanks guys

 

[HLaB]

Thank you very much for your advice. I don't think I'm anywhere near getting a pro contact.
Iv hit 47mph downhill (according to strava)
Most of my friends can hit 50+ going down this hill and it looks like they're not peddling flat out, where as I look like an idiot trying to keep up. I can take them on flats pretty easy but just wondering why the bike won't perform as well on this decent

Technique/experience has a lot to do with it. FWIW the fastest Ive been this year was on a borrowed cyclocross low (48x11 gears).

 

[Rob3rt]

Not aero enough!

 

[Shortmember]

The 52 tooth chainring connected to the 12 tooth gear on the cassette equals 113.9 gear inches,and if you can pedal that ratio easily you must have thighs like tree trunks.

 

[Dusty Bin]

I don't think we're getting the full picture here. 52/12 is good enough for all kinds of riders, up to and including the pro peloton. But somehow, the OP is routinely spinning it out. There comes a point on most downhills when it is better just to stop pedalling and tuck in. Either way, something's not right...

 

[Doyleyburger]

Hell no ! Ha ha
I think everyone is a little bewildered as to why I'm spinning out. Most of the time this is on a decent and I get pissed off that I'm wasting energy peddling like f#*k when I'm not getting any resistance at all. I think the best thing is to do, is to see if I can try my friends bike to see if I have the same problem. And then check his gear ratio. It's gonna cost me £40 to change my rings, so that will be considered if need be ☺

 

[Doyleyburger]

I am picking the bike up today from halfords. I will check it while in there

 

[Dusty Bin]

Not sure what you are checking. If you already have 52/12 as your max, then you don't need anything bigger. Anyway, I'm off out (on 50/38 and 12-25).

 

[Doyleyburger]

Coz someone said to check if they have put the wrong size ring on. Don't really understand all these numbers. Someone needs to enlighten me :/

 

[themosquitoking]

It's easy bigger numbers at the front and smaller at the back make you go fast, it is worth checking the chain ring to see if you do have the correct size on as you never know.

 

[Shut Up Legs]

If yours is a 52 you could go for a 54. Not sure how much extra speed that would give you though at 90rpm. Other than that put on weight or get some lead filled bidons.

...or eat more curry.

I've never exceeded 50mph, I just don't see the need, really.

 

[PaulSB]

Hell no ! Ha ha
I think everyone is a little bewildered as to why I'm spinning out. Most of the time this is on a decent and I get ****ed off that I'm wasting energy peddling like f#*k when I'm not getting any resistance at all. I think the best thing is to do, is to see if I can try my friends bike to see if I have the same problem. And then check his gear ratio. It's gonna cost me £40 to change my rings, so that will be considered if need be ☺

To be honest if you're spinning out on the flat I'm astonished, I don't think I've met anyone who achieves that on regular basis. On the descents you've already said you're hitting 45mph so what's the problem?

Last week I descended a local hill at 43mph, I can't say I was surprised to have spun out.

TBH I think something is wrong here.

 

[vickster]

If you like to pedal without stopping, get a fixie