Hayabusa

Tremendous typo that, of course I meant "I'm"

I interested in this and wondered how this would work with the electric motor. If you tune the petrol part will this be out of sync with the power of the electric motor (I'm which case they would wear out competing with each other),, or does the electric motor just accompany the power whatever? Just my own ignorance really. Would be really interested if you've found any more as I'd like to safely attempt that on my rx450.

I looked into this and wondered how this would work with the electric motor. If you tune the petrol part will this be out of sync with the power of the electric motor (I'm which case they would wear out competing with each other),, or does the electric motor just accompany the power whatever? Just my own ignorance really. Would be really interested if you've found any more as I'd like to safely attempt that on my rx450.

Just to clarify the only thing that has changed is that it was pressure washed on sat!

I've just noticed my 2010 rx450 do the same a few times today for the first time. No discernible change in weather conditions or anything else obvious unless it is a reaction to being pressure washed etc? Very strange feeling though.

Ok so new Avon coopers ordered for tomorrow @170 fitted. These tyres were recommended by the garage have had good reviews including clarkson for topgear on a rangerover and whilst I don't rate his technical abilities any higher than my hamster, I reckon he can probably tell a decent tyre. The garage have convinced me to switch the old rears to the front and to have the new wider tyres on the back. Works for me.

Right, checked with insurance and all is well. However to qualify that I've completely thought about this, I've tried another size site (as per the last thread (many thanks Lydiamight!), which shows less of a difference between the two tyres (7mm instead of 10mm) which even further re-inforces my thoughts. The final thought that occured to me was that changing sizes would be fine on a 2WD however those keen observers out there may have noticed that I actually only need front tyres. This means that rear drive operating at the same speed as front drive will work against each other (rear running too quick). I have additionally thought about this and think that this is still acceptable for one reason. At present my front tyres are down to the wear indicators (At least the wear indicator is still flat with the tread so it must be still borderline ) Now that point aside, the rear tyres still have good tread left and my contention is that the lost tread is probably tantamount to the same if not more than 7 or even 10mm rolling radius that the change in tyres will provide. Clearly this is only a short term issue until the rears wear down and are changed too. Anyway, not necessarily recommending this way of working, but at least its out there for consumption and its short term.

OK, I've now found reference of someone on clublexus.com forums who has already done it however they've gone 275x55x19 (3% difference to speedo reading) on standard 19" rims. Think I'm happy with the choice, just need to confirm insurance tomorrow.

Well, I've spoken to Lexus service manager. Naturally non-commital and stated that whilst the additional width will probably fit, he'd not recommend it for many reasons, but could only name insurance. I'll check further. I've been quite reassured about the width in the wheel arch as the following sites confirm; wheelfire.com (yanky site) state that the 2010 RX450h can be fitted with a 275x45x20 or a 265x35x22. performancealloys.com (UK site) also support the 2010 RX450h up to 275 on a 20" Think I'm set at that. Will check insurance tomorrow which just leaves the question of whether the 19" rim will accept the tyre. The main issue is that at this point I'm not sure of the rim width on the current 19"? Anyone?

My 2010 RX450 is currently running 235/55/19 101/W tyres and is ready for a new set (at least on the front). My driving style is occasionally hard and I notice that when pushed the front appears to be scrabbling for grip. Replacement tyres at this spec are £193 fitted each. So, having done a little investigation I've found that; If I change the tyre and profile to 255x50x19 it will give me a rolling radius difference of 0.5% i.e. indicated speed will be 0.5% more than actual speed (232.82cm becomes 231.72cm). I understand this to be an acceptable threshold when considering a tyre uplift. Additionally, this tyre puts you into land rover territory which means that the tyres are much cheaper £160 fitted for Yokos, and if you're that way inclined you can get a budget tyre for £110 (I would imagine that the budget has a grip rating very similar to teflon so I'm not wanting those). I do acknowledge that there would be additional resistance from the road that could affect how quickly the electric is operating for but for the size of the car I'm thinking that the tolerances would be less than noticable. The added bonus is that it would give me a little more rubber contact on the road and potentially assist with traction under my graceful driving. As I've scoured the internet and cannot find anyone that has done this before, does anyone know if the 255 will even fit in the wheel arch and does anyone know of any other pitfalls that I've not considered here? Thanks in advance, Steve.

For what it's worth, I'd try the following. 1) Delete the phone from the car (it sounds like you've already done this bit) 2) Delete the car from the phone 3) Do a full power off of the phone (hold the power button at the top and do the confirming swipe to continue power down). 4) Completely power off the car 5) Switch all back on again and try repairing If that fails, it may be time to call a priest (or your Lexus dealer of course).

I have the iPhone 4 with the latest software on connected to my RX450. Contacts sync quite happily. My only problem is that either the iPhone or the car drop my bluetooth signal for about 5 seconds periodically during a call. The call stays connected to the phone for the duration and then all of a sudden all is back and operational again. As far as the caller notices, my radio came on for a few seconds and then it all goes quiet as the car kit kicks back in again. Local dealer is looking in to it.

Just for completeness I thought I'd add the final update with regards to Lexus customer service handling of my DAB. I have now had confirmation that the installation is technically correct and that the DAB add-on is what it is and my problems are down to weak signal (despite having DAB for 3 years with flawless signal in these areas). It did get actually quite petty in that they even refused to tell me who developed their in car audio system too stating that their technical team were not privy to that information. A few minutes studying the manual actually showed me the Pioneer audio certificates which was quite disappointing to find after that response. No indication that anything would be investigated for the future or any interest in the fact that a competing brand was far superior than theirs. Ah well... I'm now out to seek enlightenment with a car audio specialist I guess. On the flip side, I still love the rest of the car!

Well, I've just had my RX back, rattles resolved from the centre console. AC ducting reconstructed and glove box rattle resolved however I still have one on the passenger door. DAB reception problem has gone how I'd feared though. No fault found. Can you get larger antennas for these at all? I'm assuming that they're just fitting someone else's DAB aerial kit and thus I can get better ones and DIY it! If anyone has any information I'd be grateful.

Mark, your point is bang on, for my mind it ticks all boxes. Economical if you want it Big engine for performance if you want it Big car with lots of room Luxurious Cheap to tax Cheap on company car tax I don't have to pay congestion charges when I go to London Just been out in snow and the hybrid snow mode really stabilises things a lot. To be fair, it was a no-brainer choice for me.