Buying new MTB wheels - correct sizing advice?
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Buying new MTB wheels - correct sizing advice?
Postby colinmc400 » Wed Sep 17, 2014 4:53 pm
Shimano MT55 29er Centre-Lock Rear Disc Wheel
Shimano MTB wheels are designed and engineered to the guiding principles of the Shimano quality legacy in every aspect. Optimized for confident, reliable all day trail rides.
Shimano MT55 29er Wheel Features
• Weld joint rim gives enough strength.
• High quality sealing Cup & Cone bearing.
• Quick pawl engagement for perfect traction.
• CENTER LOCK rotor mount for easy and quick installation.
• 29ER version (WH-MT55-29).
• Weight: 1100g (WH-MT55-R-29).
Shimano MT55 29er Wheel Specifications
• Brake Type: Disc
• Axle Type:QR
• Freehub Body: 8/9/10 speed
• Over Locknut:100.0
• Contact Sealing: Yes
• Rim Type: Clincher
• Rim Size: 29"
• Rim Height19.0
• Rim Width24.6
• Spoke: Butted (2.0)/Round
• Recommended Tyre: 1.50-2.25
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Re: Buying new MTB wheels - correct sizing advice?
Postby Duck! » Wed Sep 17, 2014 6:11 pm
Axles: there are regular quick release types the same as what your familiar with on your road bike, often labelled as 100 x 9 for front and 135 x 10 for rear; and there are "through axles", which you need to completely remove in order to drop the wheel out 'cos the frame & fork don't have regular open dropouts. Front through-axles are 15mm (20mm on heavy-duty downhill bikes), rear are 12mm x 142.
Brake disc mounts: there are only two types, Internationa Standard (IS) 6-bolt, and Shimano's proprietary Centrelock. Your OEM wheels will be 6-bolt. There are adaptors that allow you to fit your 6-bolt rotors to Centrelock hubs, but Centrelock rotors can't be made to fit 6-bolt hubs.
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Re: Buying new MTB wheels - correct sizing advice?
Postby colinmc400 » Thu Sep 18, 2014 9:41 am
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Re: Buying new MTB wheels - correct sizing advice?
Postby silentbutdeadly » Thu Sep 18, 2014 11:42 am
Broadly...yes. As Duck says you could have a 135mm or 142mm spacing at the rear...this is the primary measure. After that there's a couple of axle options. Easiest thing is to either show us a picture or tell us the model, year and wheel diameter of your Giant and we can help you out.colinmc400 wrote:So spacing wise, to ensure the brake disc is correctly aligned with the brake caliper, are all wheels the same?
I should point out that Shimano MT55 are hardly likely to be an improvement on the wheel you are seeking to replace...
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Re: Buying new MTB wheels - correct sizing advice?
Postby colinmc400 » Fri Sep 19, 2014 2:09 pm
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Re: Buying new MTB wheels - correct sizing advice?
Postby silentbutdeadly » Fri Sep 19, 2014 9:43 pm
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Re: Buying new MTB wheels - correct sizing advice?
Postby colinmc400 » Sun Sep 21, 2014 3:03 pm
So does this narrow it down as to what i could buy? Its a $1200 bike, so don't wanna spend a fortune(save that for the Spesh S Works Tarmac frame i just bought and the $0000's that will get spent on that). Prolly willing to spend $500 for the pair of new wheels.
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Re: Buying new MTB wheels - correct sizing advice?
Postby Baalzamon » Sun Sep 21, 2014 4:12 pm
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Re: Buying new MTB wheels - correct sizing advice?
Postby trailgumby » Sun Sep 21, 2014 9:04 pm
They will outlast several bikes, and the hubs front and rear can be adapted to different axle standards (eg 15mm thru-axle on the front and 142x12 on the rear) just by swapping inserts on the hub ends.
I have Stans rims on my 29er and they are super easy to work with for tubeless. This is perhaps a little more than you were initially planning on spending, but these wheels will be a longer term investment than your current ride.
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Re: Buying new MTB wheels - correct sizing advice?
Postby silentbutdeadly » Tue Sep 23, 2014 3:05 pm
Basically you can get any 29er or 700C 6 bolt disc wheelset that has a 9mm QR at the front and same at the rear (but with a 135 mm rear axle width).colinmc400 wrote:Righto, had the wheels off and it looks like they are more hyrbid orientated and a bid odd size. The front tyre is 700 x 35 and the rear 700 x 32. They are both Giant P-RX2 if that helps. They appear to have std quick release skewers on both ends, with the front having a space between the inside of the forks of @100mm and the rear @138mm. Both skewers are @5mm diameter. Both discs are Shimano and have 160mm diameter printed on them and are a 6 bolt fixing arrangement to the hub. The rims seem to have 622-19 printed on them, if that is the rim width maybe??
So does this narrow it down as to what i could buy? Its a $1200 bike, so don't wanna spend a fortune(save that for the Spesh S Works Tarmac frame i just bought and the $0000's that will get spent on that). Prolly willing to spend $500 for the pair of new wheels.
These will work http://www.bikebug.com/wheels-parts-mtb ... 27517.html" onclick="window.open(this.href);return false; they aren't as good as Hope Hoop but they are cheaper. TBSM has SRAM Rise 40 wheels that'll suit for about $450 a pair
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Re: Buying new MTB wheels - correct sizing advice?
Postby Duck! » Tue Sep 23, 2014 5:16 pm
Except rear Q/R axles are 10mm diameter.silentbutdeadly wrote:Basically you can get any 29er or 700C 6 bolt disc wheelset that has a 9mm QR at the front and same at the rear (but with a 135 mm rear axle width).colinmc400 wrote:Righto, had the wheels off and it looks like they are more hyrbid orientated and a bid odd size. The front tyre is 700 x 35 and the rear 700 x 32. They are both Giant P-RX2 if that helps. They appear to have std quick release skewers on both ends, with the front having a space between the inside of the forks of @100mm and the rear @138mm. Both skewers are @5mm diameter. Both discs are Shimano and have 160mm diameter printed on them and are a 6 bolt fixing arrangement to the hub. The rims seem to have 622-19 printed on them, if that is the rim width maybe??
So does this narrow it down as to what i could buy? Its a $1200 bike, so don't wanna spend a fortune(save that for the Spesh S Works Tarmac frame i just bought and the $0000's that will get spent on that). Prolly willing to spend $500 for the pair of new wheels.
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Re: Buying new MTB wheels - correct sizing advice?
Postby colinmc400 » Wed Sep 24, 2014 9:59 am
Except rear Q/R axles are 10mm diameter. [/quote]Duck! wrote:[
Basically you can get any 29er or 700C 6 bolt disc wheelset that has a 9mm QR at the front and same at the rear (but with a 135 mm rear axle width).
So the 10mm axle dimension is measured where exactly, as i measured mine and i could have sworn they were @5mm??? That was right in the middle of the axle shaft, as opposed to the hole size in the fork or on the chain stay.
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Re: Buying new MTB wheels - correct sizing advice?
Postby Duck! » Wed Sep 24, 2014 10:17 am
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Re: Buying new MTB wheels - correct sizing advice?
Postby silentbutdeadly » Wed Sep 24, 2014 10:44 am
Pedant!Duck! wrote:Except rear Q/R axles are 10mm diameter.
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Re: Buying new MTB wheels - correct sizing advice?
Postby colinmc400 » Wed Sep 24, 2014 2:44 pm
Phew, thats explained that then! Cheers.Duck! wrote:Axle diameter is measured at the section which sits in the dropouts. The 5mm measurement you've got would be the Q/R skewers, not the axles. For further reference, axle length is measured from the outer faces of the locknuts on the axle, not from the actual axle ends (there's about 5mm each end past the locknuts to sit in the dropouts).
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Re: Buying new MTB wheels - correct sizing advice?
Postby colinmc400 » Wed Sep 24, 2014 2:50 pm
http://www.this link is broken/au/e ... prod124948" onclick="window.open(this.href);return false;
http://www.this link is broken/au/e ... prod124946" onclick="window.open(this.href);return false;
Or are these better?
http://www.this link is broken/au/e ... prod114423" onclick="window.open(this.href);return false;
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Re: Buying new MTB wheels - correct sizing advice?
Postby silentbutdeadly » Thu Sep 25, 2014 10:55 am
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Re: Buying new MTB wheels - correct sizing advice?
Postby colinmc400 » Thu Sep 25, 2014 3:30 pm
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