C70 rotor diameter
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    1. #1
      Junior Member russ399's Avatar
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      C70 rotor diameter

      I need to replace the front brake pads on our 2010 C70 (auto, T5) and need to know the rotor diameter without measuring the originals? I see they can be 300mm or 320mm.

      Will the VIN offer any clues?
      2010 C70 T5 Ice White w/ off-black interior
      2015.5 XC60 Bright Silver, T6 Platinum w/ off-black interior now with Polestar!

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    3. #2
      Member thefisch33's Avatar
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      Doubtful. Easiest way it to look at the front caliper. If the tension bar is a thin metal wire, like a coat hanger, it's 300. If it's flat, 320. this is the 300mm


      '10 s40 m66 awd
      '12 c30
      2010 s40 T5 AWD M66 R1 Slotted Rotors&EBC Red Stuff, straightpipe, eibach springs

    4. #3
      Member thefisch33's Avatar
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      and this is the 320


      '10 s40 m66 awd
      '12 c30
      2010 s40 T5 AWD M66 R1 Slotted Rotors&EBC Red Stuff, straightpipe, eibach springs

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    6. #4
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      Try just looking at the gaps between the disc and the wheel front and back. If the gap on the front wheel is smaller (disc bigger) it's 320, if it's the same size it's 300

    7. #5
      Member thefisch33's Avatar
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      Quote Originally Posted by Sysyphus61 View Post
      Try just looking at the gaps between the disc and the wheel front and back. If the gap on the front wheel is smaller (disc bigger) it's 320, if it's the same size it's 300
      Instead of just looking at the caliper you want to eyeball a 20mm difference from what the rear rotor looks like?


      '10 s40 m66 awd
      '12 c30
      2010 s40 T5 AWD M66 R1 Slotted Rotors&EBC Red Stuff, straightpipe, eibach springs

    8. #6
      Junior Member russ399's Avatar
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      Quote Originally Posted by thefisch33 View Post
      and this is the 320


      '10 s40 m66 awd
      '12 c30
      Thanks!

      Based on the pictures, I need the 320MM set. I am looking online and I see sets with a cable (thickness sensor I presume) and sets without a cable. Without tearing into mine, any idea if we need the cable/sensor?
      2010 C70 T5 Ice White w/ off-black interior
      2015.5 XC60 Bright Silver, T6 Platinum w/ off-black interior now with Polestar!

    9. #7
      Member thefisch33's Avatar
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      Those are generic pictures. Our brake pads don't have sensors. I don't think any volvos do.


      '10 s40 m66 awd
      '12 c30
      2010 s40 T5 AWD M66 R1 Slotted Rotors&EBC Red Stuff, straightpipe, eibach springs

    10. #8
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      Well pardon me, I was just trying to be helpful. I was actually typing my reply at the same time you were posting yours, went to the garage to look at mine and verify that the difference is quite obvious. Didn't see your answer until after I had posted mine.

    11. #9
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      If you want to give me your VIN, I can confirm for sure.

      Your Canadian source for Original Volvo Parts and Accessories: Parts.VolvoPointeClaire.com
      2012 C70 T5 A - Polestar Tune, Elevate downpipe, VIVA Performance exhaust, JR filter, GoVo ECU spacer, 19"x8.5" Polestar Rep wheels, H&R spacers, Volvo OEM lip spoiler, Heico front spoiler lips
      2005 V50 T5 M AWD - Passion Red/Graphite T-tec, sport pkg, Volvo body kit
      1998 S70 T5 M - Black/Graphite, 239whp/317wtq on old setup, List of mods

    12. #10
      Junior Member russ399's Avatar
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      all ready to replace the front brakes and now I see that Volvo uses torx screws to hold the calibers. What torx socket size do I need to remove the calipers?
      2010 C70 T5 Ice White w/ off-black interior
      2015.5 XC60 Bright Silver, T6 Platinum w/ off-black interior now with Polestar!

    13. #11
      I bought a 3 piece set of Lisle brand torx bit sockets at oriellys auto parts. The part number is 27740 and it's called a brake caliper torx bit set containing a t40 t45 and t50. I can only see evidence of useage on the t50, although I thought I'd used these on something else too. I believe I used that for rotor but it could have been on another vehicle. The pins for the calipers are Allen/hex.
      Last edited by rodneygt; 05-31-2017 at 11:48 AM.

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