Sunrace MegaRange 7 Speed Freewheel - 13-34T

Customer Reviews (2)
5 / 5| Write your review
£17.99 Please note this product has selling restrictions to your country. was
Manufacturer : 
SJS Cycles part number : 
Manufacturer part number : 
- Model Number: MFMM4S 7CV (U)
- Function: Fluid Drive Plus
- Speed: 7 Speed
- Number of Teeth: 13-34T
- Gear Combination: 13-15-17-19-21-24-34T
- Sprocket Finish: (U) Zinc + EDB
- Sprocket Material: Steel
- Spacer Material: Engineering Polymers
- Chain Compatibility: 7.3mm
- Average Weight: 504g

Requires a Shimano type splined freewheel removal tool. (Shimano's own is SJSC part #870)
Product Reviews (2)
Questions & Answers (8) Q & A
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Product Reviews (2)
Overall Product Rating 5 / 5
By Mark
11 Nov 2020
5 / 5
I recommend this product
ConsBig - but inevitable - jump from 1st to 2and gear.
ProsNow low enough bottom gear. No problems with gear changing.
Enabled me to keep using my folding bike here in the Pennines, in conjunction with a Shimano MTB derailleur. Now I never have to get off and push, thanks to 'underdrive'!
By Nick
29 Nov 2018
5 / 5
I recommend this product
ProsGreat value for the money
Replaced the original Shimano freewheel perfectly.
Questions & Answers (8)
Can I replace the sprockets individually?
05 Oct 2022
What is the right tool for removing the sprocket lockring? I keep replacing the whole when I only need a 34t big sprocket. A more even spread of ratios would be nice too.
Thank you for enquiry, no the freewheel is riveted together in one piece, for the tool please see SJS Cycles part number : 27348

WD 05/10/22
Is this suitable as a straight swap for the Shimano MF-TZ500-7?
24 Feb 2021
Thank you for your enquiry, yes will fit fine.

Regards WD 25/02/21
Can I take this apart and use some of the cogs on a 6 speed hub? I cant get my freehub off.
13 Nov 2020
I would like a wider range on my tandem gears but i can't get the freehub off the wheel (I've tried bolting the removal tool and fixing it into a vice - but broken the cast steel vice!). I have removed the locking rung on y block and can therefore mix and match the cogs, if I can get the right ones to fit the freehub. Does the locking ring come off this block so that I can take cogs off it?
NO- we do not advise taking this apart. This is riveted together so it cannot be disassembled

JK 13.11.20
Can replace the Shimano MF TZ 31 ?
06 Nov 2020
Hi, yes this uses the same fitting however note that this Freewheel uses 13-34T gearing and MF-TZ31 uses 14-34t gearing.

JK 06.11.20
which derailleur and chainwheel
04 Jul 2019
bet with my son I couldn’t rebuild an ancient peugeot tourney I bought a wheel taking a freewheel type hub choosing 13/34 as Im old, please advise on derailleur chainwheel chain and shifters and if I can buy them altogether with you
Difficult to advise without discussing more but the following would PROBABLY work;

Chainset - SJS Cycles part number : 13441
BB - SJS Cycles part number : 31L110 - (110mm)
Front mech - SJS Cycles part number : 46426
Rear Mech - - either depending on fitting.
Shifters - SJS Cycles part number : 35521 -for STI OR SJS Cycles part number : 21015 - or Downtube
Chain - SJS Cycles part number : 18592

Thanks - 05/07/19
Equivalent to SJS #37046
08 Apr 2019
Hi - Co use this as a like for like swap on sjs part #37046?

Yes, these have the same fitting, speed and ratio.

Thanks - 08/04/19
What is the width from the smallest cog to the biggest?
23 Mar 2019
I do need to know the width to check the frame's clearance as it's for an upgrade from 6 speed to 7.
Thank you very much
Thank you for your enquiry, the width of this freewheel is 34.65mm.
Regards. 27/03/19
Is Gear Selection As Good As Shimano? Is This Suitable For An Indexed System?
24 Mar 2017

As these are a direct Shimano copy the shifting should be very close to Shimano. These are suitable for an indexed system.