I mistakenly ordered these bearings thinking they were for a fourstoke. Unfortunately, they are for the XLS model and not the RFS model. Yet, the bearings were the lowest cost around and absolutely the highest quality for the price! Since this order, I have placed two more for other engine projects I have in work at the present time.
Replaced standard bearings in my New OS 105HZ for these SS 6 months ago and motor is still very smooth and powerful, My other standard bearing OS 105HZ engine which i had bought at the same time is well over due for a bearing change very rusty, noisy and has always been sticking, Both engines are in TREX 700 and have run around the same amount of hours on 23% Nitro and 15%LV + 3%MV TOTAL 18% Coolpower oil. Have also OS 91HZ M speed with same SS bearings 10 months on and still very smooth and more powerful, These bearings are the bomb for true nitro freaks like me
The S16003 s.s. rear bearings is a vast improvement over the stock Super Tiger rear bearing, and will noit rust, thus saving you a lot of time and money by not having to replace rusted bearings.