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**vivekgautams** · 05-11-2013, 05:58 PM

Re: TVS Apache RTR 180

Originally posted by rocker View Post

Check if different tire profile fiddles with ABS. I hope not but still out of curiosity I just wanna know.

Sent from my ST25i

Up sizing tyres does NOT effect the working of ABS.. It enhances the braking like anything..

**rocker** · 05-11-2013, 06:25 PM

Re: TVS Apache RTR 180

Originally posted by vivekgautams View Post

Up sizing tyres does NOT effect the working of ABS.. It enhances the braking like anything..

Its really nice if it improves braking but what about sidewall height increase.

Sent from my ST25i

**shahbaz63** · 05-11-2013, 07:21 PM

Re: TVS Apache RTR 180

Checked & Confirmed ... no effects on ABS whatsoever, Infact I can feel my front brake more effective now ... little speed & rpm difference now, speed going +2/3 kph more to rpm (with stock tyre)

5000 rpm 5th Cog = 68/69 now

**rocker** · 05-11-2013, 08:03 PM

Re: TVS Apache RTR 180

Originally posted by shahbaz63 View Post

Checked & Confirmed ... no effects on ABS whatsoever, Infact I can feel my front brake more effective now ... little speed & rpm difference now, speed going +2/3 kph more to rpm (with stock tyre)

5000 rpm 5th Cog = 68/69 now

Thats good. And who cares about +- 2/3 when getting fat and grippy rubber on the bike

Sent from my ST25i

**vivekgautams** · 05-11-2013, 10:08 PM

Re: TVS Apache RTR 180

Originally posted by rocker View Post

Its really nice if it improves braking but what about sidewall height increase.

Sent from my ST25i

Height is increased by some 6-8mm only. Not much difference in the height.. But the speedo shows a few more kmph at fixed rpms(some 94/96kmph @7k rpm) & the cushioning effect of the tyres is really good, it makes the ride supper smooth..

**shahbaz63** · 05-13-2013, 10:09 AM

Re: TVS Apache RTR 180

Ceat Vertigo till now impressed me, bikes goes as per road angle ... I am njoyin it so far though its still at early stage ...

**MidnightEvil Parth** · 05-13-2013, 11:59 AM

Re: TVS Apache RTR 180

Originally posted by shahbaz63 View Post

Ceat Vertigo till now impressed me, bikes goes as per road angle ... I am njoyin it so far though its still at early stage ...

Vertigo sport or vertigo rage. ??

Sent from my MT11i using xBhp Connect mobile app

**evyavan** · 05-13-2013, 12:10 PM

Re: TVS Apache RTR 180

Originally posted by vivekgautams View Post

But the speedo shows a few more kmph at fixed rpms

Is there an actual increase in speed with higher profile tires or is it what the speedo shows giving room to errors?

**vivekgautams** · 05-13-2013, 12:54 PM

Re: TVS Apache RTR 180

Originally posted by evyavan View Post

Is there an actual increase in speed with higher profile tires or is it what the speedo shows giving room to errors?

When the height increases the radius/diameter also increases & when radius increases the circumference also increases,Hence the distance traveled for one rotation also increases.. The speedo of all bikes come readily equipped with errors

like 0-60 or 0-100 timer & a few bikes show 100kmph but when compared to a car the reading would be some 92/95 kmph..All speedos show errors when compared to a GPS device.. BUT I could feel the bike goes faster at particular rpm(s)( coz I do the same stretch of NH4 every week & ride at the same rpm range always), the increase in speed is legitimate & not just a digital error..

**evyavan** · 05-13-2013, 01:29 PM

Re: TVS Apache RTR 180

Originally posted by vivekgautams View Post

the increase in speed is legitimate & not just a digital error..

Yes, the bikes come with speedo errors and I guess our beasts sport an error margin of 1.083 or similar points. That makes the console show 134 at an actual 124 kmph.

I got my answer in the last sentence though.

So, the speed too increases at specific RPMs.

**vivekgautams** · 05-13-2013, 01:48 PM

Re: TVS Apache RTR 180

Originally posted by evyavan View Post

Yes, the bikes come with speedo errors and I guess our beasts sport an error margin of 1.083 or similar points. That makes the console show 134 at an actual 124 kmph.

I got my answer in the last sentence though.

So, the speed too increases at specific RPMs.

Specific rpm means the bike used to do 80kmph @ 6k rpm on the 110/80 & now does 84kmph & used to do 92kmph @7k rpm now does 98kmph..
There is a constant change of speed at every rpm but it is easy to note down n remember the change of speed at these rpms, like 5k,6k & 7k rpms..

**Adarsh_Bk** · 05-13-2013, 02:27 PM

Re: TVS Apache RTR 180

When rear tyre profile is changed, the actual speed of the bike changes (depends on the profile).

When front tyre profile is changed, the speedo starts indicating wrongly because the speed sensor is mounted on front wheel, which was calibrated to the original profile.

**evyavan** · 05-13-2013, 02:42 PM

Re: TVS Apache RTR 180

Originally posted by Adarsh_Bk View Post

When rear tyre profile is changed, the actual speed of the bike changes (depends on the profile).

When front tyre profile is changed, the speedo starts indicating wrongly because the speed sensor is mounted on front wheel, which was calibrated to the original profile.

So what happens when both are changed? From what I understand from your post one must not change the front tire profile to keep a check on the speedo readings. But what will happen if both ends got tires with unmatched profiles? I'm not sure if I'm asking the proper question.

**Traveller01** · 05-13-2013, 03:05 PM

Re: TVS Apache RTR 180

Changing the tyre with a tyre of different aspect ratio is like changing the gearing (like we do with sprocketing) so its not just the speedo error there will be some real change.

**aditya_iyer** · 05-13-2013, 05:07 PM

Re: TVS Apache RTR 180

I guess we can also improve ride quality by using dry nitrogen filling besides making sure that we use a correct tire profile for our bikes [some scorn at this as it is said that going against manufactures tires could result in performance drop]. Heard it requires slight less filling then normal air but adds life to tires as well as a slight performance boost in which some say better grip/stability & increase in speed as well has been noticed & can be mixed with normal air in case nitrogen filling in not available. Can anyone vouch for these claims coz i have seen some lengthy discussions about them in **********[http://**********.in/tyres-nitrogen-gas/ & http://**********.in/pros-cons-nitrogen-gas-tyres/] besides as my bike is new & done only [853km..damn exams

], i guess i feel like sticking to the default tire but feel like upgrading to nitrogen gas from normal to both preserve life of tire & maintain performance during the risky rainy season besides changing my rear flap to the optional fender bender to prevent putting mud on people ridding behind me

PS - also found a good thread related to this [http://www.xbhp.com/talkies/universa...-nitrogen.html]

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