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  # 1330616 24-Jun-2015 12:33
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Smaller diameter wheels will give you better gearing (torque is the correct physics term) to climb.

That's assuming you have disc brakes.




Swype on iOS is detrimental to accurate typing. Apologies in advance.


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  # 1330934 24-Jun-2015 19:11
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You don't have to stick to 38mm wide tyres, you could easily get away with some like these...
http://www.torpedo7.co.nz/products/01TY1NNCC/title/schwalbe-cx-comp-cyclocross-tyre---700-x-35c 

Even including a new tube you'll probably spend less than $50 for both front and back.

For off road riding on those tyres you'll want to run less pressure than you would with your current tyres when riding on the road.  In winter on my mountain bike on 26x2.35" tyres I usually ride at 38psi, slighty less if it's been raining lots and slightly more if its dryer.  The narrower the tyre the more pressure you'll want so maybe start somewhere around 45-50psi and then let some air out or put more in and see how they feel and what you like the best. 

 
 
 
 




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  # 1332686 27-Jun-2015 18:13
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Now I am getting my head around the sizings etc. I should also point out bike will still be used on road aswell, so I think I am looking for a cyclocross tyre. My wheel size is obviously 700. Current tyres are 700 x 38c. I am thinking the wider the tyre the better for grip on gravel etc??? what is the widest tyre I can use on a 700 rim? Does it involve measuring the frame? where do I measure?

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  # 1332725 27-Jun-2015 19:17
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you measure the frame at the same area that your current tyre sits. as that is about where the new one will sit.

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  # 1332751 27-Jun-2015 20:38
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Does the bike have disc brakes or rim style brakes. If the brakes are rim brakes, the max width of your tyre is more likely to be restricted by the brakes or the chainstay.



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  # 1332773 27-Jun-2015 22:13
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It has rim / v brakes. So basically all 700c wheels have the same rim width?

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  # 1332841 28-Jun-2015 07:50
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generally the rims are all the same width and the tyres are made to fit these

 
 
 
 




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  # 1333108 28-Jun-2015 23:38
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These are classed as road tyres? but look like cycloscross? I am guessing there is not a lot of difference???..
http://www.evolutioncycles.co.nz/index.php?route=product/product&product_id=27529
http://www.torpedo7.co.nz/products/01TYRNNLC/title/schwalbe-land-cruiser-wire-bead---700-x-40c

These are 42c's. It seems for cyclocross tyres even 38c is on the large side yet I have always thought my current 38c's were 'thin road tyres' compared to the mountain bike style tyres on my previous bikes. My only reservation is they might make the bike not feel as sharp on the road. I guess they should be fine as they are cyclocross..
http://www.trademe.co.nz/sports/cycling/parts-components/tyres-tubes/auction-909420138.htm

35c's... kind of hesitant about going thinner than my current 38's though, or will the added knobs make allot of difference..
http://www.torpedo7.co.nz/products/01TY1NNCC/title/schwalbe-cx-comp-cyclocross-tyre---700-x-35c
http://www.torpedo7.co.nz/products/01TY1NNCD/title/schwalbe-cx-comp-cyclox-tyre-wire---700-x-35c

38c cyclocross:
http://www.ebay.com/itm/1x-SCHWALBE-CX-COMP-700-x-38c-WIRED-CYCLOCROSS-BIKE-BICYCLE-SEMI-SLICK-TYRE-/251893647711?pt=LH_DefaultDomain_15&hash=item3aa608095f

Tread pattern doesn't look great on this set:
http://www.ebay.com/itm/1x-SCHWALBE-IMPAC-CROSSPAC-700-X-38C-HYBRID-CYCLOCROSS-BIKE-TYRE-/281574964641?pt=LH_DefaultDomain_15&hash=item418f2cfda1


I would say riding would be split 50/50 between road and off road. Off road mainly meaning man made dirt tracks / walk ways / grass. Light - medium gravel. At the moment (with my 700 x 38c slick tyres) if I see a small area of wet dirt I have to be really carefull, and with light gravel I am always on my toes. I want to be able to relax a bit more on such surfaces. Which tyres will be best?

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  # 1363129 11-Aug-2015 19:41
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If you're in Auckland, pop by these people and get their advice:

 

 

 

http://www.tumekecyclespace.org.nz/?page_id=2




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  # 1363173 11-Aug-2015 20:33
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If all the off road you're planning to do is in a gravel surface I think 38's will be plenty wide enough. Perhaps you may want a better quality of tyre, I don't know what tyres you have but the info I found for your bike said 700 X 38 Kenda tyres.

I have a set of Specialized Infinity Armadillos 700 X 32 on my hybrid.  They are good on the road and on gravel. They are very puncture resistant.  

Remember the wider the tyre the harder (more effort required) the bike will be to ride on the road especially.

Take a look here, there is a good range of sizes (widths) available. 

http://www.specialized.com/us/en/ftb/cityurban-tires/paved-use-tires/infinity-armadillo 

This is a US site but you should be able to buy the same range locally.

Don't scrimp on cheap tyres.  If you decide you want/need a wider tyre, once you've decided on a size and make, take your bike to the shop where you intend to buy the tyres and make sure they'll fit.





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