C172 pilot reported a near midair collision with an rv-7 on short final at O88 airport.

Attributes
ACN	1472462
Time
Date	201708
Local Time Of Day	1201-1800
Place
Locale Reference	O88.Airport
State Reference	CA
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	Final Approach
Route In Use	Visual Approach
Flight Plan	None
Aircraft 2
Make Model Name	RV-7
Operating Under FAR Part	Part 91
Flight Phase	Final Approach
Route In Use	Visual Approach
Person 1
Function	Single Pilot
Qualification	Flight Crew Private
Experience	Flight Crew Last 90 Days 12 Flight Crew Total 268 Flight Crew Type 132
Events
Anomaly	Conflict NMAC Deviation - Procedural Published Material / Policy
Miss Distance	Horizontal 30 Vertical 30

Narrative:

[I was] practicing touch and goes; staying in the pattern making my radio calls at every phase of flight at traffic pattern altitude at a non-towered airport. [I] didn't hear any other pilots making radio calls. [I] made my radio call from right base to final looking and checking for traffic for runway 25. I had a stabilized approach when suddenly another airplane had come from behind and over the top of me for landing.I side stepped and did a go around and landed. After the event I spoke with the other pilot. He told me he was on the wrong frequency. I asked him how he entered the pattern; he told me he was north east and entered a right base and he didn't see me. I was already on final at 500 ft. I told him that there [are] a lot of new students training at this airport and procedure is 45 entry to runway 25 at pattern altitude. He mentioned that he was familiar with the airport and visits frequently. I said we're both lucky that we're standing here and able to talk to each other to evaluate the near miss.

Original NASA ASRS Text

Title: C172 pilot reported a NMAC with an RV-7 on short final at O88 airport.

Narrative: [I was] practicing touch and goes; staying in the pattern making my radio calls at every phase of flight at traffic pattern altitude at a non-towered airport. [I] didn't hear any other pilots making radio calls. [I] made my radio call from right base to final looking and checking for traffic for Runway 25. I had a stabilized approach when suddenly another airplane had come from behind and over the top of me for landing.I side stepped and did a go around and landed. After the event I spoke with the other pilot. He told me he was on the wrong frequency. I asked him how he entered the pattern; he told me he was north east and entered a right base and he didn't see me. I was already on final at 500 ft. I told him that there [are] a lot of new students training at this airport and procedure is 45 entry to runway 25 at pattern altitude. He mentioned that he was familiar with the airport and visits frequently. I said we're both lucky that we're standing here and able to talk to each other to evaluate the near miss.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.