tayar lama = getah keras = kurang grip
tayar baru = getah lembut = grip 

Gang,

If that the case, what is the best combination of the tyre size?

For normal ride, js keep the front tyre as thin as possible. We only want the driving wheel (rear wheel) to have maximum grip on the road surface, so the power from engine can be transferred to the road efficiently. non-driving wheel adds extra frictional force to counter the acceleration.

why no 1 answer my question???

Here's some tips on tyre setting, assuming stock setting (70/90F, 80/90R) is a neutral steer setting.

So...
Increase the front tyre width while keeping the rear tyre stock, we will get oversteering.

Increase the rear width while keeping the front tyre stock, we will get understeering.

I've tried 70/90F and 90/80R (lo-profile). The bike becomes slightly understeer, but I like this settings because I can open full throttle earlier during corner exit. However, due to slight understeer, going through consecutive S-curves need more braking skills (to shift the bike's weight to front and make the rear slides a bit).

For normal ride, js keep the front tyre as thin as possible. We only want the driving wheel (rear wheel) to have maximum grip on the road surface, so the power from engine can be transferred to the road efficiently. non-driving wheel adds extra frictional force to counter the acceleration.

so from this post, we cam conclude that thin front tyres such as 70/90 and 80/90 is the best. while for rear, low profile like 80/80 and 90/80 (you can try 110/70 if you want ) is the most suitable. am I right bro charge-n-go?

thx for the info dude...might getting 100/80, wanna bigger rear tyre which will result understeer to me...

then nvm lo...tell me the price from other state also can..cheaper better...negeri 9 how much?? pls tell me all the price...i want to get the cheapest...

Salam LCian, kongsi ilmu yang aku dapat dan guna pakai.... kalau salah tolong tunjukkan...

yang mempengaruhi speedometer tu adalah:
1. diameter keseluruhan tayar

apa yang mempengaruhi diameter keseluruhan?
1. Lebar tayar dan profile (dari sini kita dapat tau tinggi sidewall)
2. Size Rim

kita ambil contoh, perbandingan antara (lebar/profile) 80/90 dengan 100/80 guna rim diameter yang sama iaitu 17":

a. 80/90: (tayar asal)
lebar = 80, profile = 90

--> tinggi side wall tayar = 90% dari 80 (mm) = 72mm (7.2cm)

guna tayar rim diameter 17" (1 inch = 2.54cm) = 43.18 cm

jadi, diameter keseluruhan* = diameter rim + (tinggi sidewall x 2) = 43.18 + (7.2 x 2) = 57.58cm (D1)

b. 100/80 (tayar baru)
lebar = 100, profile = 80

--> tinggi side wall (dinding tepi) tayar = 80% dari 100 (mm) = 80mm (8cm)

tetap guna tayar rim diameter 17" (1 inch = 2.54cm) = 43.18 cm

jadi, diameter keseluruhan* = diameter rim + (tinggi sidewall x 2) = 43.18 + (8x2) = 59.18cm (D2)
__________________________________________________________________________________________

Apa perubahan yang kita nampak secara matematik?

1. pertambahan tinggi sidewall sebanyak 0.8 cm
2. pertambahan diameter keseluruhan sebanyak 1.6 cm

Pada aplikasi harian, apakah yang berubah?
1. ride height akan bertambah sebanyak 1.6 cm
2. speedometer akan under read (istilah kita kira berat la)
3. daya pecutan / acceleration akan menurun sedikit

LC selalu dihubungkan dengan meter ringan, jadi kita tengok apakah dengan pakai tayar gedabak 100/80 kat depan akan membuatkan meter LC bertambah berat atau lebih accurate?

Perkiraan yang diambil adalah dari total diameter;
formula untuk perubahan kelajuan (dalam %) sebenar berbanding dengan bacaan speedo meter adalah

= (D2 - D1)/D2 x 100

Jadi dalam kes yang dibincangkan di atas, perubahan yang didapati adalah = (59.18 - 57.58)/59.18 x 100 = 2.7 %

1. dengan kombinasi tayar baru ini, kelajuan motor anda adalah 2.7% lebih tinggi daripada yang dilihat pada speedometer
2. bila speedo anda menunjukkan kelajuan 100kmph, maka anda sebenarnya bergerak pada kelajuan 102.7 kmph, 2.7 kmph lebih laju daripada speedometer
3. bila speedo anda menunjukkan kelajuan 140kmph, maka anda sebenarnya bergerak pada kelajuan 143.78 kmph, 3.78 kmph lebih laju daripada speedometer

Kesimpulan: tukar tayar besar akan membuat meter lebih berat?? betul!! tapi tidak significant sehingga kita boleh claim yang meter kita dah accurate. Kalau tukar sport rim yang lebih besar i.e. 18" mungkin akan lebih significant perbezaannya (belum tentu accurate)... tapi seperti biasa, pickup terpaksa dikorbankan.

Sekian, semoga dapat menyelesaikan isu tayar vs meter yang sering hangat dibincangkan....

hehe, i m pretty sure it will cause heavy understeer if the front tyre remain at 70/90. Good for big corner, but bad for tight corners and S-curves. If the engine is upgraded, then 100/80 is good, coz we can do power-oversteer to neutralize the heavy understeer behaviour.

got this from MBC, credit to bro fba76 for this useful info. sorry, no English version available. any effort to translate this post into English is most welcomed

hehe, if front can use 60/80 lagi bagus. It's a lo profile thin tyre.
80/90 and 80/80 has the same width, but 80/80 is better bcoz it is lighter (due to smaller sidewall), and more stable.

got this from MBC, credit to bro fba76 for this useful info. sorry, no English version available. any effort to translate this post into English is most welcomed

can i ask something?? the 135lc with cluctch that color was blue and white is limited edition???annie wan(anyone) answer me please...

and i want to ask izit join this forum will be the member of 135lc club member? or need another registration?
can let me know if there is another way pls..

can i ask something?? the 135lc with cluctch that color was blue and white is limited edition???annie wan(anyone) answer me please...

Thanks for the sharing bro. The explanation is very clear and its awesome, though i dont 100% understand all the malay words 
So the bottom line is... in order to make your speedometer more "accurate", you'll need to change the front tyre to bigger one, but at the same time you need to sacrifice the pickup, right? 

i jus rode my 135LC extream spirit at jalan duta,
haha....
but prefer zx600r