Speding or Speeding: How To spell?
The word Speding is misspelled against Speeding, which is present continuous of "Speed"
Speeding has double "ee" is mispronounced as "e"Remember double 'EE' in between the strings Sp & ding which should not be misspelled with single 'E'
Wrong Spelling:  Sp-e-ding  Correct Spelling:  Sp-ee-ding 
Find more wrongly spelled words of Speeding to spell it well.